30pcs Diamond Rotary Burrs set Dremel Tools Accessories with 1/8' 3.2mm shank All of the shanks are 3.17mm and compatible with other mutlitool machines including Dremel. Contents: 150 grit assorted diamond point.For crafts & modelling. Use of ceramics, tiles, brick, glass, plastics, fibreglass, steel & wood.30,000 rpm maximum.mum. Packaging Details Unit Type: set Package Weight: 0.090kg (0.20lb.) Package Size: 15cm x 6cm x 2cm (5.91in x 2.36in x 0.79in) Package Included Package Include: 30pcs Diamond Rotary Burrs set Dremel Tools Accessories with 1/8' 3.2mm shank'