--- product_id: 666183519 title: "RULLINE Adjustable Floor Support Jacks - Set of 4, Ideal for Floor Joists, RV Steps Stabilizer,Mini Screw Jack (3.5\" to 6\" Extension)" brand: "rulline" price: "¥19831" currency: JPY in_stock: true category: "Rulline" url: https://www.desertcart.jp/products/666183519-rulline-adjustable-floor-support-jacks-set-of-4-ideal-floor store_origin: JP region: Japan --- # 3.5"-6" adjustable height Safety lock set screw Heavy-duty steel build RULLINE Adjustable Floor Support Jacks - Set of 4, Ideal for Floor Joists, RV Steps Stabilizer,Mini Screw Jack (3.5" to 6" Extension) **Brand:** rulline **Price:** ¥19831 **Availability:** ✅ In Stock ## Summary > 🛠️ Elevate your space with precision and power — don’t settle for shaky support! ## Quick Answers - **What is this?** RULLINE Adjustable Floor Support Jacks - Set of 4, Ideal for Floor Joists, RV Steps Stabilizer,Mini Screw Jack (3.5" to 6" Extension) by rulline - **How much does it cost?** ¥19831 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/666183519-rulline-adjustable-floor-support-jacks-set-of-4-ideal-floor) ## Best For - rulline enthusiasts ## Why This Product - Trusted rulline brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Crafted from heavy-duty steel for unmatched durability - • **Versatile Utility:** Perfect for floor joists, RV steps, and tight spaces - • **Compact Powerhouse:** Small footprint, massive support strength - • **Safety-First Design:** Includes a lock set screw for secure, worry-free use - • **Precision Height Control:** Easily adjustable from 3.5" to 6" with a pipe wrench ## Overview The RULLINE Adjustable Floor Support Jacks set includes 4 mini screw jacks made from heavy-duty steel, offering adjustable heights from 3.5" to 6". Designed for professional-grade support in confined spaces, these jacks feature a safety lock set screw and are ideal for stabilizing floor joists, RV steps, and leveling tasks. Compact yet robust, they deliver reliable strength and easy height adjustments with a simple pipe wrench. ## Description Description: Compact yet Powerful:The Mini Screw Jack may be small in size, but its strength and durability are anything but small. User-Friendly Adjustments:Easily adjust the height of the Mini Screw Jack with a simple pipe wrench. Turn the screw to the desired height and secure it in place with the positioning nut. Safety First:Crafted with high-quality materials, this adjustable support jack is exceptionally versatile and ideal for use in confined spaces. The inclusion of a safety lock set screw ensures added security. Versatile Applications:Whether temporarily securing a weak floor or utilizing it as a home leveling post floor jack, this Mini Screw Jack proves its utility in a variety of situations. Sturdy and Durable Construction:Constructed from heavy-duty steel, the Support Jack is not only durable but also provides robust support for various applications. Material：Metal Color:Silver Note: Please allow 1-3CM differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding Please tell us first when you have any problem, we will give you the best service and solve the problem ASAP. Thank you so much. This product is designed and tested to provide the highest degree of performance and usability- under extreme conditions- for demanding users. Thank you for supporting our small busines ## Features - Compact yet Powerful:The Mini Screw Jack may be small in size, but its strength and durability are anything but small. - User-Friendly Adjustments:Easily adjust the height of the Mini Screw Jack with a simple pipe wrench. Turn the screw to the desired height and secure it in place with the positioning nut. - Safety First:Crafted with high-quality materials, this adjustable support jack is exceptionally versatile and ideal for use in confined spaces. The inclusion of a safety lock set screw ensures added security. - Versatile Applications:Whether temporarily securing a weak floor or utilizing it as a home leveling post floor jack, this Mini Screw Jack proves its utility in a variety of situations. - Sturdy and Durable Construction:Constructed from heavy-duty steel, the Support Jack is not only durable but also provides robust support for various applications. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CTSXV1VN | | Brand Name | RULLINE | | Color | Silver | | Compatible with Vehicle Type | RV | | Customer Reviews | 4.1 4.1 out of 5 stars (22) | | Item Weight | 2.37 Kilograms | | Manufacturer | RULLINE | | Manufacturer Part Number | CA-RAP012-4 | | Material Type | silver | | Maximum Lifting Height | 6.04 Inches | | Minimum Height | 3.5 Inches | | Model Number | CA-RAP012-4 | | Style Name | Floor Jack | | Unit Count | 4 Count | ## Product Details - **Brand:** RULLINE - **Colour:** Silver - **Material:** silver - **Maximum lifting height:** 6.04 Inches - **Vehicle service type:** RV ## Images ![RULLINE Adjustable Floor Support Jacks - Set of 4, Ideal for Floor Joists, RV Steps Stabilizer,Mini Screw Jack (3.5" to 6" Extension) - Image 1](https://m.media-amazon.com/images/I/71ynwYae0vL.jpg) ![RULLINE Adjustable Floor Support Jacks - Set of 4, Ideal for Floor Joists, RV Steps Stabilizer,Mini Screw Jack (3.5" to 6" Extension) - Image 2](https://m.media-amazon.com/images/I/61Rojj0v0zL.jpg) ![RULLINE Adjustable Floor Support Jacks - Set of 4, Ideal for Floor Joists, RV Steps Stabilizer,Mini Screw Jack (3.5" to 6" Extension) - Image 3](https://m.media-amazon.com/images/I/61mQx4Tex-L.jpg) ![RULLINE Adjustable Floor Support Jacks - Set of 4, Ideal for Floor Joists, RV Steps Stabilizer,Mini Screw Jack (3.5" to 6" Extension) - Image 4](https://m.media-amazon.com/images/I/71VQZ7XP63L.jpg) ![RULLINE Adjustable Floor Support Jacks - Set of 4, Ideal for Floor Joists, RV Steps Stabilizer,Mini Screw Jack (3.5" to 6" Extension) - Image 5](https://m.media-amazon.com/images/I/61qvsEjlewL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - RULLINE Adjustable Floor Support Jacks - Set of 4, Ideal for Floor Joists, RV Steps Stabilizer,Mini Screw Jack (3.5" to 6" Extension) - YEUQWJ 2 Pack Adjustable Support Jack for The Floor,Post Floor Joist Jacks,Deck Foundation,RV Step Stabilizer,Mini Screw Jack- Post 4" to 7" --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/666183519-rulline-adjustable-floor-support-jacks-set-of-4-ideal-floor](https://www.desertcart.jp/products/666183519-rulline-adjustable-floor-support-jacks-set-of-4-ideal-floor) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-07-21*