The Irwin® Blue 4x Groove wood boring bits have a micro groove point and cutting Edges with extended spurs that cut the hole instead of scraping it. The result is a flat bit that bores holes twice as fast and lasts up to three times longer than traditional flat bits.
8 piece set comprises : 12, 16, 18, 20, 22, 25, 28 and 32 mm diameter bits.
Contained in robust plastic case.