Package includes:<br />10/14/15/16/20pcs x Diamond Holes Saw Drill Bits<br /><br /><br />Specifications:<br />Material: steel<br />Size: <br />10pcs: 3/4/5/6/8/10/12/18/32/50mm<br />0.12"/0.16"/0.20"/0.24"/0.31"/0.39"/0.47"/0.71"/1.26"/1.97"<br /><br />14pcs: 3/5/6/8/10/12/16/18/20/30/40/50/60/70mm<br /><br />15pcs: 6/8/10/12/14/16/18/20/22/25/26/28/30/40/50mm <br />        0.23/0.31/0.39/0.47/0.55/0.62/0.7/0.78/0.86/0.98/1.02/1.10/1.18/1.57/1.97"<br /><br />16pcs: 6/8/10/12/14/16/18/20/22/25/28/30/35/40/45/50mm<br />0.24/0.31/0.39/0.47/0.55/0.63/0.71/0.79/0.87/0.98/1.10/1.18/1.38/1.57/1.78/1.97inch<br /><br />20pcs: 4/5/6/7/8/10/12/13/14/15/16/18/20/22/25/27/30/32/35/40mm<br /><br />Use note:<br />Start your hole diagonally， make a round trace and then hold drill straight.<br /><br />Features:<br />--Can be used with a standard electric drill.<br />--Always use lubrication water， otherwise the diamond core drill will burn.<br />--Materials and only needs water for lubrication.<br />--This diamond coated core drill bit removes a complete circleglass， marble， tiles，granite， ceramic or other.<br /><br />