Combination Drill & Taps
3 Flute Chamfering 90 Degees 4.5-50mm 6542 Countersink Drill Bit Wood Metal Hole Drilling Tool Metal 1Pcs
See the second picture for details

Specification:
Type: Countersink
Drill BitMaterial: High Speed Steel
Degrees: 90
Size Including: 4.5mm 6.3mm 8.3mm 10.4mm 12.4mm 16.5mm 18mm 20.5mm 25mm 30mm 35mm 40mm 50mm
Application:
It is suitable for use in the work-piece which the hardness is under 25 degrees, such as aluminum sheet, thin iron plate, the insulatuing board or PVC board.
Note:
Due to the difference between different monitors, the picture may not reflect the actual color of the item.
Package Including:
1pc Countersink Drill Bit