1、[25mm Hole Diameter] This lathe tool holder base measures 230mm (9 inch) in length with a 25mm (1 inch) hole diameter, fitting for 1 inch tool rest post. 2、[Sturdy Alloy Steel] Crafted from premium alloy steel, this tool holder base provides excellent shock absorption, wear resistance, and impact resistance for lasting durability. 3、[Long Lasting] The surface of the tool holder base is treated with rust and oxidation resistant coating, ensuring optimal performance even in challenging work environments. 4、[Smoothly Operation] Guide your finger along the hardened rod edge, providing a smoothly surface for sliding rotating tool on your finger, allowing comfortable finger control during work. 5、[Easy to Use] Simplifies the learning curve for turning, no need to memorize complex angles, ideal for woodworking enthusiasts or DIYers of all skill levels.