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 Tone Material: Diamond, High-Speed Steel Drill 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
