--- product_id: 4415618 title: "Brush Research GB41824 FLEX-HONE®, 4-1/8\" (105mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials" brand: "flex-hone" price: "¥18574" currency: JPY in_stock: true category: "Flex Hone" url: https://www.desertcart.jp/products/4415618-brush-research-gb41824-flex-hone-4-1-8-105mm-diameter store_origin: JP region: Japan --- # 240 grit silicon carbide abrasive Self-centering & self-aligning design Proudly Made in USA Brush Research GB41824 FLEX-HONE®, 4-1/8" (105mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials **Brand:** flex-hone **Price:** ¥18574 **Availability:** ✅ In Stock ## Summary > ⚙️ Elevate your cylinder finish game with the original FLEX-HONE® — where precision meets performance! ## Quick Answers - **What is this?** Brush Research GB41824 FLEX-HONE®, 4-1/8" (105mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials by flex-hone - **How much does it cost?** ¥18574 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/4415618-brush-research-gb41824-flex-hone-4-1-8-105mm-diameter) ## Best For - flex-hone enthusiasts ## Why This Product - Trusted flex-hone brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Operation:** Self-compensating for wear—no special training or setup needed - • **Dual-Action Efficiency:** Simultaneously deburr and finish in one seamless setup - • **Versatile Grit Options:** Tailor your finish with 11 grit choices for perfect crosshatch patterns - • **Universal Compatibility:** Works effortlessly on mild steel, stainless steel, cast iron & more - • **Precision Engineered Oversize:** Ensures optimal pressure for flawless cylinder finishes every time ## Overview The GB Standard Duty Flex-Hone is a premium, USA-made honing tool designed for precision finishing and deburring of cylinders. Featuring a self-centering, oversized design and 240 grit silicon carbide abrasive, it delivers a superior oil-retentive crosshatch finish ideal for hydraulic, pneumatic, engine, and brake cylinders. Compatible with various rotating spindles and materials, it streamlines finishing and deburring in a single operation, boosting seal life and performance. ## Description The FLEX-HONE® tool was originally created by Brush Research Manufacturing to deglaze cylinder walls in automotive applications. Brush Research embraced the benefits of a plateau finish and pioneered the concept of plateau honing culminating in the introduction of the FLEX-HONE® tool in 1972. The FLEX-HONE® has gained many nicknames over the years and including ball hone, ball style hone, flexihone, dingleberry hone, bead brush, glaze breaker and glaze buster. Flexible honing with the FLEX-HONE® tool produces an oil holding cross hatch pattern and a true plateau finish free of cut, torn and folded metal. Any type or size of cylinder can benefit from the FLEX-HONE®. These abrasive bead style brushes are produced in standard diameters from 4mm to 36 inches. Nine abrasive types are offered including Silicon Carbide, Aluminum Oxide, Boron Carbide and Diamond allowing the tool to be tailored to finish any base material. A choice of 11 different grit selections are available for precise control of finish parameters. The elimination of peaks results in rapid ring seating, better oil control, reduced seepage in hydraulic and pneumatic applications and provides better seal performance and longer seal life. Successful applications include firearm chambers, shotgun barrels, musical instruments, combustion chambers, air compressors, pumps, valve bodies, valve guides, brake cylinders, wheel cylinders and the list goes on and on. FLEX-HONE® tools are also very effective for deburring cross drilled holes, port radiusing and edge blending. Because of its unique construction, the FLEX-HONE® is self-centering, self-aligning, and self-compensating for wear so it does not require an elaborate set-up or special training. Deburring can be effectively automated and combined in the machining process to allow a complete cylinder finish in one operation or it can be employed as a secondary operation with equal results. ## Features - [QUALITY]-Proudly Made in the USA. Quality and consistency you can count on made from the inventors and makers of the tool. - [DESIGN]-The FLEX-HONE is intentionally manufactured oversized. This engineered oversize creates the optimal amount of pressure inside the cylinder wall allowing the tool to be self-centering, self-aligning and self-compensating for wear and easy use. - [FINISHING BENEFITS]-Offered in a wide variety of grits to achieve specific finishing tolerances as well as a beautiful crosshatch finish. Ideal for rebuilding hydraulic and pneumatic cylinders, engine and brake cylinders, valve guides, pumps, compressors and more. - [CROSSHOLE DEBURRING]-Accomplish finishing and deburring simultaneously in a single setup. Can be used in virtually any rotating spindle from a hand drill, drill press or CNC equipment. - [240 GRIT SILICON CARBIDE ABRASIVE]-Excellent on mild steel, stainless steel, cast iron and other softer ferrous materials. Typically achieves a finish of 24 - 32 Microinch (.6 - .8 Micrometer). - [WHAT'S INCLUDED]-1 Each of a GB Standard Duty FLEX-HONE: 4.125" (105mm) Bore Diameter, 4" Abrasive Part Length, 0.310" Shank Diameter, 13.5" Overall Length. For Use on Bore Diameters Between 3.751"-4.125". PLEASE NOTE: ORDER BY BORE SIZE. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002XUL1GW | | Best Sellers Rank | #10,388 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Flex Hones | | Brand Name | Flex-Hone | | Bristle Type | Abrasive Globule Bonded To Flexible Nylon Filament | | Compatible Material | Other Softer Ferrous Materials, Stainless Steel, Mild Steel, Cast Iron | | Customer Reviews | 4.8 4.8 out of 5 stars (1,839) | | Grit Material Type | Silicon Carbide | | Grit Type | 240 Grit | | Included Components | GB 4-1/8" (105MM) 240SC FLEX-HONE | | Item Diameter | 4.13 Inches | | Item Dimensions | 13.5 x 5 x 5.1 inches | | Item Weight | 1 Pounds | | Manufacturer | Brush Research Manufacturing | | Material Type | Silicon Carbide | | Model | GB41824 | | Number of Items | 1 | | Number of Pieces | 1 | | Part Number | GB41824 | | Recommended Uses For Product | Deburring, Finishing | | UPC | 843469144249 | | Unit Count | 1.0 Count | | Warranty Description | Manufacturer Warranty | ## Product Details - **Brand:** Flex-Hone - **Bristle Type:** Abrasive Globule Bonded To Flexible Nylon Filament - **Grit Material:** Silicon Carbide - **Grit Type:** 240 Grit - **Material:** Silicon Carbide ## Images ![Brush Research GB41824 FLEX-HONE®, 4-1/8" (105mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials - Image 1](https://m.media-amazon.com/images/I/61f9Ueb7-8L.jpg) ## Available Options This product comes in different **Size, Style** options. ## Frequently Bought Together - Brush Research GB41824 FLEX-HONE®, 4-1/8" (105mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials - Permatex 81950 Ultra Slick Engine Assembly Lube, 4 oz. , Red --- ## 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/4415618-brush-research-gb41824-flex-hone-4-1-8-105mm-diameter](https://www.desertcart.jp/products/4415618-brush-research-gb41824-flex-hone-4-1-8-105mm-diameter) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-07-07*