High-Carbon Steel Cutting Drill Chamfer Set - Golden (3 PCS)
3/8" chamfer: Shaft diameter: 6.35mm; Head: 9.53mm; Suitable for 2~5mm hole; 1/2" chamfer: Shaft diameter: 6.35mm; Head: 12.7mm; Suitable for 5~9mm hole; 3/4" chamfer: Shaft diameter: 6.35mm; Head: 19mm; Suitable for 8~13mm hole.