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: 10mm / 0.39-inch* Drilling Depth: 31mm / 1.22-inch* Shank Diameter: 6mm / 0.24-inch* Total Length: 52mm / 2.05-inch Package Content: * 10 x Glass Hole Saw.
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