【SIZE】5 pieces 50mm mini glass saw blades,4 pieces with arbor, 1 piece with handle; cutter head grit width: 10mm, bore/shank: 6mm. Comes with a hex shank wrench to help change shanks. 【ULTRA-THIN FOR FINE CUTTING】Ultra-thin design of only 1mm realizes compact and smooth cutting of glass, jade, crystal, tile, wine bottles and other materials to avoid surface damage. Less grinding dust, less noise, avoid surface damage, very suitable for professionals and DIY enthusiasts. 【ULTRA-HIGH DURABILITY】The use of high-quality diamond material and vacuum brazing process ensures long life and high durability of the cutting tool, which is extremely cost-effective. 【RE-USE】6mm shank can be reused, with the purchase of light hole saw blade can reduce the cost more, convenient and flexible. 【MACHINE】Generally used for handheld grinder (engraving machine), hand drill. Suggested RPM: 16000RPM-27000RPM. Can be used both wet and dry, add water to use it for better effect and the life will be prolonged.