WHOLESALE 2pc STEP BIT 9 & 13 STEP 6x titanium bits last six times longer. Includes 9 step and 13 step bits. Automatically deburrs holes as you drill. 1/4" hex shank chucks securely into drills, and will not spin. Titanium coated bits present a higher quality finish due to reduced friction and heat. Titanium coated bits last up to 6x longer.