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: 1.7mm / 0.07",2.5mm / 0.1" Drill Bit Length: 16mm / 0.63", 26mm / 1.02" Shank Diameter: 1.28mm / 0.05",2.25mm / 0.09" Total Length: 38.5mm / 1.52",53.5mm / 2.11" Package Content:2 x Diamond Twist Drill Bits
