uxcell 4mm Diamond Drill Bits Hole Saws for Glass Ceramic Porcelain Tiles Pack of 2

Description: * This glass hole saw needs to be used at a low speed, about 800-1000RPM. * Please start your hole diagonally, make a round trace and then hold drill straight. * In order to prolong the life of this glass hole saw, please work with coolant when processing. * Wide used for drilling glass, ceramics, porcelain, ceramic tile, porcelain tile, limestone, slate, marble, granite, light stone and fiberglass. Specification: * Material: Carbon Steel, Diamond Particles * Color: Silver Tone * Drilling Diameter: 4mm / 0.16-inch * Drilling Depth: 15mm / 0.59-inch * Shank Diameter: 3mm / 0.12-inch * Total Length: 50mm / 2-inch Package Content: * 2 x Glass Hole Saw