About this item High Speed Steel (HSS) with titanium plating ensures these rotary tools stay durable and sharp for a long time. 20 types of bits meet different woodworking and drilling needs. 1/8-inch shank, 1.5-inch total length. Each bit is made with high precision. Work with most small rotary tools for DIY carving fans, perfect for engraving, chamfering, chamfering, slotting, reaming, and hollowing on soft material like wood and plastic. The 20pcs rotary burr set comes in a neat carrying case for easy access and convenient storage, no need to organize always keep neat.