The head is sharp, the blade is sharp, the drilling speed is High hardness and longer service life For automotive glass drilling Head diameter 0.9mm tail chain 1.5mm Color: as shown Material: metal Package Contents: 20 x Drill Bits Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.