Straight shank countersink set. Suitable for deep countersinking applications in M3, M4, M5, M6, M8 & M10 holes. DIN338. Specifications • Length: 45mm - 63mm • Diameter: 6.3mm - 20.5mm Contents • 6.3mm Countersink • 8.3mm Countersink • 10.4mm Countersink • 12.4mm Countersink • 16.5mm Countersink • 20.5mm Countersink • Metal Case