Product details:

These step drill bits give best-in-class performance in impact drivers with the versatility to be used in drills. The 1/4 In. hex shank has an optimized SHOCKZONE body providing you with the industry's most durable shank, reducing early shank breaks. A TiAIN (Titanium Aluminum Nitride) coating helps deliver 5X longer life, while the step drill bit's Rapid Strike tip and dual spiral flute produce 2X faster holes. Pieces In Set:3 Pcs., Material:Titanium, Size:#2 #3 #8