features:
--100% and high quality.
--can be used with a standard electric drill.
--always use lubrication water, otherwise the diamond core drill will burn.
--materials and only needs water for lubrication.
--this diamond coated core drill bit removes a complete circleglass, marble, tiles,granite, ceramic or other.
specifications:
size: 6 - 50mm/0.23"-1.97"
6/8/10/12/14/16/18/20/22/25/28/30/35/40/45/50mm
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
material: steel
use note:
start your hole diagonally, make a round trace and then hold drill straight.
package includes:
16 x diamond holes saw drill bits 
