Irwin 4x Blue Groove Flat Bits have double cutting spurs that scribe outside of the hole, reducing breakout. The thicker cutting edge provides a longer drilling lifetime. The specially designed Blue Groove Point and cutting edge allow for a faster chip removal rate. 

They have a 10% larger, 1/4in quick change shank for improved durability. Come supplied in a wallet.

Sizes: 6, 8, 10, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 28, 32, 35 and 38mm.