The Irwin HSS Pro Drillbits are manufactured from high quality HSS steel with a steam oxide surface finish.
They have precision ground cutting edges for fast drilling and perfect finishing, a ground flute for maximum accuracy and fast chip removal and a universal 118º point shape for drilling a wide selection of materials.

The Irwin IRW10502271 HSS Pro Drillbits comes in a bulk pack of 10 with the following dimensions:
Drillbit diameter: 4.0mm
Total length: 75mm
Working Length: 39mm