Brush Research GB31224 FLEX-HONE®, 3-1/2" (89mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

The Brush Research GB41824 FLEX-HONE® is an outstanding tool for honing mild steel, stainless steel, and cast iron. The 240-grit silicon carbide abrasive delivers a smooth, consistent finish. Its 4-1/8" diameter is perfect for my applications, and the flexible design ensures even material removal. Highly durable and efficient—exceeds expectations! A must-have for precision work.

This FLEX-HONE® GB41824 tool performs very well, truly achieving efficient and uniform deburring and polishing. The 240-grit silicon carbon sand material combined with the flexible brush wire can easily process the inner walls of various metals such as cast iron, stainless steel, and low carbon steel, improving the surface finish and contact performance.

The FLEX-HONE® is an outstanding tool for deburring and surface finishing! The 240-grit silicon carbide abrasive works perfectly on mild steel, stainless steel, and cast iron. It delivers a smooth, uniform finish with minimal effort. Durable and easy to use—highly recommended for automotive and machining applications. Great value for the quality.

Works well on 4.00" bore as well as 4.125" but may be too sloppy in a 4.250" cylinder (don't know that for sure, just thinking it). Grit is good for ring jobs with cast rings.

The Brush Research FLEX-HONE® is an outstanding tool for anyone looking to achieve a smooth, polished finish on metal surfaces. With its 3-1/2" (89mm) diameter and 180 grit silicon carbide abrasive, this hone is perfect for deburring, surface finishing, and edge blending. Users consistently praise its ability to produce a consistent, smooth finish without causing damage to the base material. Whether you're working on automotive, industrial, or DIY projects, this hone provides excellent results every time.

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The Brush Research FLEX-HONE® works great for deglazing and polishing cylinders. The 240 grit silicon carbide delivers a clean, smooth finish on mild steel and cast iron. Durable, easy to use, and delivers professional results every time!The Brush Research FLEX-HONE® works great for deglazing and polishing cylinders. The 240 grit silicon carbide delivers a clean, smooth finish on mild steel and cast iron. Durable, easy to use, and delivers professional results every time!

this ball hone is the right grit for cleaning the cylinder and cross hatching