About Drill Warehouse: Drill Warehouse has always devoted itself to providing drill products with excellent quality for the end-users. Description: ★The product of high-grade natural diamond sand, the special enhanced electroplating sand treatment from solidification. ★Opening neat, smooth, no broken edges, will not produce tremor. ★Small incision resistance, opening speed, easy chip removal and so on. ★Can be used for glass, ceramics, marble and other brittle hard material drilling (especially suitable for glass on the hole) ★The use of water must be used, is strictly prohibited dry drilling. New assorted 3mm to 13mm Diamond coated hole saw / drill bits (total: 11 pcs) ★Can be used with a standard electric drill(Not Included) ★Start your hole diagonally, make a round trace and then hold drill straight Instructions: Glass opening device can be installed in ordinary hand drill or bench drill and other professional drilling machine used, because this hole is not the central positioning of the drill bit, hole opening device to operate when the 45-degree tilt, slow down the drill speed, slow (The crescent can play the role of positioning), and then vertical drill, so you can successfully complete the hole work, pay attention to the hole when the speed can not be too fast, be sure to slow down the opening of the hole, , In particular, began to drill and about to drill through when the saying goes slowly work fine work, in the process of opening it must be continued to add water cooling hole device. Package Include: 10pcs Diamond Coated Drill Glass Ceramic Hole Saw
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