Descriptions:Fits for drills, flex shafts, bench drills, and hanging mills.Suitable for drilling holes in glass, shells, etc.Note: Adding the coolant can increase work efficiency and extend service life.Specifications:Color: Silver ToneMaterial: Diamond, High-Speed SteelDrill Bit Diameter: 1mm / 0.04",1.7mm / 0.07"Drill Bit Length: 11mm / 0.43", 16mm / 0.63"Shank Diameter: 0.7mm / 0.027",1.28mm / 0.05"Total Length: 28mm / 1.1",38.5mm / 1.52"Package Content:2 x Diamond Twist Drill Bits.
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