---
product_id: 454203332
title: "OKG Small U Lock - 4 Keys, Heavy Duty 18mm Hardened Alloy Steel Shackle - Anti-Cut/Anti-Pry Security Chain Lock for Motorcycle, E-Bike, Trailer (No Security Chain)"
brand: "okg"
price: "¥16090"
currency: JPY
in_stock: true
reviews_count: 5
category: "Okg"
url: https://www.desertcart.jp/products/454203332-okg-small-u-lock-4-keys-heavy-duty-18mm-hardened
store_origin: JP
region: Japan
---

# 18mm hardened alloy steel shackle Dual anti-drill stainless steel cylinder Double deadbolt anti-theft locking OKG Small U Lock - 4 Keys, Heavy Duty 18mm Hardened Alloy Steel Shackle - Anti-Cut/Anti-Pry Security Chain Lock for Motorcycle, E-Bike, Trailer (No Security Chain)

**Brand:** okg
**Price:** ¥16090
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in your peace of mind with uncompromising strength!

## Quick Answers

- **What is this?** OKG Small U Lock - 4 Keys, Heavy Duty 18mm Hardened Alloy Steel Shackle - Anti-Cut/Anti-Pry Security Chain Lock for Motorcycle, E-Bike, Trailer (No Security Chain) by okg
- **How much does it cost?** ¥16090 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/454203332-okg-small-u-lock-4-keys-heavy-duty-18mm-hardened)

## Best For

- okg enthusiasts

## Why This Product

- Trusted okg brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **User-Friendly Reversible Keys:** Smooth operation with dust protection for long cylinder life
- • **Weatherproof & Rust-Resistant:** Silicone coating and anti-rust cover for all-season durability
- • **Double Deadbolt Locking System:** Enhanced holding power for ultimate security
- • **Unbreakable 18mm Alloy Shackle:** Cut-proof, forged for maximum theft resistance
- • **Certified Gold-Standard Security:** ART 4 STAR & Sold Secure Gold certified for peace of mind

## Overview

The OKG Small U Lock features a heavy-duty 18mm hardened alloy steel shackle combined with a double deadbolt locking mechanism, delivering superior resistance against cutting, prying, and drilling attacks. Designed for versatile use with motorcycles, e-bikes, trailers, and more, it boasts a weatherproof silicone coating and rust-resistant lock case. Certified to ART 4 STAR and Sold Secure Gold standards, this compact yet robust lock offers professional-grade security with user-friendly reversible keys and dust protection, making it the go-to choice for millennial professionals who demand both style and substance in their security gear.

## Description

OKG Mini U shackle lock is great for indoor and outdoor security requirements, protecting your valuables from theft, such as bicycles, motorcycles, containers, scooters, ATVs, generators, fence gates, etc. High security can be resistant to hand tool attacks such as bolt cutters, saws, hammers, chisels, etc. The vinyl-coated lock body and shackle prevent the scratching of your valuables while the lock is in use.

Review: It’s a great lock, high quality, heavy duty security - This lock is really high quality, it fits the price, it’s not exactly cheap. But I think it’s worth the price for a piece of mind, It’s heavy duty and the material seems so robust that I personally doubt most thefts would even try to mess with it, the material seems to be better than some name brands, I highly recommend this lock.
Review: Solid Lock - I bought this Mini U-Lock thinking it would fit my OKG Heavy Duty Security Chain, unfortunately I didn't look close enough at the chain specs or the U-lock. The diameter of the U-lock shackle is too thick to fit through the Chain, my mistake. I contacted the seller directly and asked them if they had a lock to fit the chain I bought as I was very impressed by the chain I did not want to return it. They responded quickly by offering me a replacement heavy duty padlock for free as long as I kept the U-lock. Most likely I will be purchasing another chain to fit the diameter of the original U-lock shackle, as the lock feels very solid is the right size and appears well made, supported by a company that stands behind their products. Take note there is no mounting system for this lock included, but it's so small I can just put it in a bike truck bag, or back pack to transport, although I intend on just leaving it locked to my bike rack at my work.

## Features

- High-security heavy duty motorcycle disc locks with a double deadbolt locking structure designed for extensive holding power and anti-theft performance.
- MAX-Performance 18mm (11⁄16 in.) U shackle hardened cut proof alloy steel, combo use with security chain and security cable, ideal for indoor and outdoor all-weather.
- Reinforce anti-rust cover lock case and dual anti-drill stainless steel lock cylinder combination resists both cutters and picks attacks and leverage attacks.
- 2 BRASS STEEL user-friendly reversible key and sliding dust cover protects and extends cylinder life, ART 4 STAR test standard and SOLD SECURE GOLD CERTIFIED.
- Easy to use very safe and sturdy, often used as a bicycle lock or motorcycle disc brake lock, or gate fence lock. Can be used in combination with a security chain or cable to replace a motorcycle chain lock etc. Product size: 4.5 x 4.3 inches (115 x 110 mm), Product weight: 2.0 lbs (0.935 kg)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B21Z8CJY |
| Additional Features | Use Standalone or with Security Chain, Cable |
| Brand | okg |
| Brand Name | okg |
| Color | Black / Orange |
| Control Method | Remote |
| Customer Reviews | 4.6 out of 5 stars 153 Reviews |
| Finish Types | Silicone Coating Prevents Scratches |
| Included Components | Includes 2 keys |
| Item Dimensions | 11.4 x 10.9 x 4.1 centimeters |
| Item Weight | 2 Pounds |
| Item dimensions L x W x H | 11.4 x 10.9 x 4.1 centimeters |
| Lock Type | U Locks |
| Lock type | U Locks |
| Manufacturer | OKG |
| Manufacturer Part Number | UL-16 |
| Material | Hardened Manganese Steel, Stainless Steel , Silicone |
| Material Type | Hardened Manganese Steel, Stainless Steel, Silicone |
| Model Name | UL-16 |
| Model Number | UL-16 |
| Number of Pieces | 1 |
| Recommended Uses For Product | Ideal for Heavy Duty Security Chain and Security Cable Combo Bike Locks |
| Recommended uses for product | Ideal for Heavy Duty Security Chain and Security Cable Combo Bike Locks |
| Shape | U Shackle |
| Special features | Use Standalone or with Security Chain, Cable |
| Style Name | Heavy Duty Small U Lock |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** okg
- **Item dimensions L x W x H:** 11.4 x 10.9 x 4.1 centimeters
- **Lock type:** U Locks
- **Material:** Hardened Manganese Steel, Stainless Steel, Silicone
- **Special features:** Use Standalone or with Security Chain, Cable

## Images

![OKG Small U Lock - 4 Keys, Heavy Duty 18mm Hardened Alloy Steel Shackle - Anti-Cut/Anti-Pry Security Chain Lock for Motorcycle, E-Bike, Trailer (No Security Chain) - Image 1](https://m.media-amazon.com/images/I/61Lj8PwFpAL.jpg)
![OKG Small U Lock - 4 Keys, Heavy Duty 18mm Hardened Alloy Steel Shackle - Anti-Cut/Anti-Pry Security Chain Lock for Motorcycle, E-Bike, Trailer (No Security Chain) - Image 2](https://m.media-amazon.com/images/I/71iHZi16vbL.jpg)
![OKG Small U Lock - 4 Keys, Heavy Duty 18mm Hardened Alloy Steel Shackle - Anti-Cut/Anti-Pry Security Chain Lock for Motorcycle, E-Bike, Trailer (No Security Chain) - Image 3](https://m.media-amazon.com/images/I/61D2jws7omL.jpg)
![OKG Small U Lock - 4 Keys, Heavy Duty 18mm Hardened Alloy Steel Shackle - Anti-Cut/Anti-Pry Security Chain Lock for Motorcycle, E-Bike, Trailer (No Security Chain) - Image 4](https://m.media-amazon.com/images/I/914iD4gISHL.jpg)
![OKG Small U Lock - 4 Keys, Heavy Duty 18mm Hardened Alloy Steel Shackle - Anti-Cut/Anti-Pry Security Chain Lock for Motorcycle, E-Bike, Trailer (No Security Chain) - Image 5](https://m.media-amazon.com/images/I/61UI3dDVMAL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ It’s a great lock, high quality, heavy duty security
*by M***F on 13 October 2025*

This lock is really high quality, it fits the price, it’s not exactly cheap. But I think it’s worth the price for a piece of mind, It’s heavy duty and the material seems so robust that I personally doubt most thefts would even try to mess with it, the material seems to be better than some name brands, I highly recommend this lock.

### ⭐⭐⭐⭐⭐ Solid Lock
*by D***. on 13 December 2023*

I bought this Mini U-Lock thinking it would fit my OKG Heavy Duty Security Chain, unfortunately I didn't look close enough at the chain specs or the U-lock. The diameter of the U-lock shackle is too thick to fit through the Chain, my mistake. I contacted the seller directly and asked them if they had a lock to fit the chain I bought as I was very impressed by the chain I did not want to return it. They responded quickly by offering me a replacement heavy duty padlock for free as long as I kept the U-lock. Most likely I will be purchasing another chain to fit the diameter of the original U-lock shackle, as the lock feels very solid is the right size and appears well made, supported by a company that stands behind their products. Take note there is no mounting system for this lock included, but it's so small I can just put it in a bike truck bag, or back pack to transport, although I intend on just leaving it locked to my bike rack at my work.

### ⭐⭐⭐⭐⭐ Well made u-lock!
*by C***R on 20 March 2026*

I like this small U-lock. It's got some weight to it and small. Looks tough. Nice design and premium feel. I think I made a good investment when I bought it because I still have it.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-07-21*