size 1: 8/10/14/16/18/22/26/38/45/50mm<br />size 2: 5/6/8/10/12/14/16/18/20/22mm<br />size 3: 4/8/10/12/14/15/18/20/22/30mm<br />size 4: 8/10/12/14/16/18/20/22/25/50mm<br />size 5: 3/4/5/6/8/10/12/18/32/50mm<br />size 6: 10/14/16/18/20/26/32/38/45/50mm<br />size 7: 6/8/10/12/15/16/18/20/22/30mm<br /><br />features:<br />--100%  and high quality.<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 />specifications:<br />size: 3mm/0.12&quot;， 4mm/0.16&quot;， 5mm/0.20&quot;， 6mm/0.24&quot;， 8mm/0.31&quot;， 10mm/0.39&quot;， 14mm/0.55&quot;， 16mm/0.62&quot;， 18mm/0.7&quot;， 22mm/0.86&quot;， 26mm/1.02&quot;， 32mm/1.26&quot;， 38mm/1.50&quot;， 45mm/1.77&quot;， 50mm/1.97&quot;<br />material: steel<br /><br />use note:<br />start your hole diagonally， make a round trace and then hold drill straight.<br /><br />package includes:<br />1 set diamond hole saw 10pcs<br />size 1: 8/10/14/16/18/22/26/38/45/50mm<br />size 2: 5/6/8/10/12/14/16/18/20/22mm<br />size 3: 4/8/10/12/14/15/18/20/22/30mm<br />size 4: 8/10/12/14/16/18/20/22/25/50mm<br />size 5: 3/4/5/6/8/10/12/18/32/50mm<br />size 6: 10/14/16/18/20/26/32/38/45/50mm<br />size 7: 6/8/10/12/15/16/18/20/22/30mm