1. Widely Used: Power Tool Kit, 6 Pieces Mini Disc, Disc Drill Blades Suitable for Drills, Mini Drills, Rotary Tools, Most Power Tools, Carving Tools. 2. High Quality Material: Sturdy HSS, in line with the unique advanced scientific cutting principle, avoiding the defects of other saw discs. 3. Drill disc size: 2225, 32, 35, 44, 50*0.8*6.35 in diameter; 1/8" chuck shank. 4. Cutting discs are for cutting wood, plastic, fiber, glass, aluminum alloy, soft metal, etc. 5.Notes: Not suitable for cutting hard objects such as hard steel, and please hold carefully to avoid being injured by the blades. 6 Pieces Mini Rotary Tool Cutting Discs - Rotary Tool Accessories, Disc Drill Blades and 3 Chuck Shanks Made of high speed steel High speed steel: quenching at temperature around 1205~1215, hardness 61~66.2HRC.Super hardness and abrasion resistance extend the life of saw blades or mini circular saw discs. Cutting discs are for cutting wood , plastic, fiber, glass, aluminum alloy, soft metal, etc. Piercing disc size: 2225, 32, 35, 44, 50*0 .8*6.35 in diameter; Inner diameter: 6.35mm; Thickness: 0.8mm Chuck Shank Size: 1/8 inch (3mm), and 1/4 inch ( 6mm) Cutting discs with 3mm (1/8inch) shank chuck and are compatible with most rotary tools, air tools or electric grinders. Easy to install, these circular saw blades are suitable for DIY projects, craft enthusiasts and people who work on wood, aluminum, plastic or do DIY. Usage Correct The entire chuck shank must be inserted to the end to avoid unnecessary damage and injury. This is because when the machine speed is too high, the chuck may twist or the cutting angle may get off center. Please tighten the screw on the top before using to avoid any unnecessary damage and any injury, because the electric grinder is a high-speed running tool. To meet different requirements, ensure operation safety and extend the service life of cutting blades and mini blades. -HSS saw, the rotation speed should not exceed 20,000 rpm.