Description: 16-25MM Lengthened Thread Alloy Hole Saw Cutter Forstner Drill Bit Woodworking Punching Hex Shank. Specification: Material:Hard Alloy; Total length:120 mm; Working length:80mm; Shank diameter:7.5mm; Blade diameter:16/18/20/22/25mm (optional); Uses: Can be used for perforation of wood products, installation of spherical door locks, drawer lock wood, plastic products, opening of various plates Features: Hight Performance - Sharp edge,Smoother less noisy, high hardness,accurate positioning,high precision,smooth cutting,impact resistance,high toughness. Premium Quality - High quality alloy blade is selected to make the blade sharper and more durable. The curved design of the head is conducive to chip removal and perforation efficiency is higher. Special Design - High hook and shear angles allow the tool to cut smoothly into the stock,producing clean,crack-free. Suitable for - Perforation of wood products, installation of spherical door locks, drawer lock wood, plastic products, opening of various plates. Package List: 1 x Hole Drill