Product Model alloy buttons Taper water A thick*high (°) hole Dalishen chisel drill bit 42mm 8~10*13.5~18 7 2 40mm 8~10*13.5~18 7 2 38mm 8~10*13.5~18 7 2 36m m 8~10*13.5~15 7 2 34mm 8~10*13.5~15 7 2 32mm 8~10*13.5~15 7 2 30mm 8~ 10*13.5~15 7 2 Product Model alloy buttons Taper water thick*high (°) hole Dalishen cross drill bit 50mm 10*16 7 3 42mm 8*12 7 3 40mm 8*12 7 3 38mm 8*12 7 3 36mm 8*12 7 3 Product Model alloy buttons Taper water gauge front angle (°) hole Dalishen button drill bit 42mm 3*9 1*8 25° 7 2 40mm 3*9 1*8 25° 7 2 36mm 3*9 1*8 25° 7 2 34mm 3*8 1*8 25° 7 2 32mm 3*8 1*8 25° 7 2