TYPE: Random Color Material: High Speed Steel; Type: HSS Saw Blades; 1 set of HSS Saw Blades ( 1 x Mandrel, 6 x HSS Saw Blades ) ; Each Blades Diameter Sizes: 22mm/ 0. 87", 25mm/ 0. 98", 32mm/ 1. 26", 35mm/ 1. 38", 44mm/ 1. 77", 50mm/ 1. 97" ( Approx. ) ; Extension Rod Size: 3. 175mm/ ( Approx. ); Suitable for timber, plastic, fiberglass, copper, aluminium and thin sheet metal, ideal for use in carpentry, Flooring, hobbies and crafts. Suitable for most power rotary tools, the mini rotary tool is suitable for DIY projects and the home hobbyist. These cutting wheel set for rotary tool are easy to install and replace, also great gifts for those who are working on wood, metal, DIY craft.