IIT 25010 135&deg; Split Pt. 29Pc Titanium Drill Bit Set 4 Drilling Metal Wood Plastic, Advanced 135 degree split point bits prevent walking and provide quick penetration. Titanium coated drill bits produce a higher quality finish due to reduced friction and heat. Titanium drill bits last up to 6 times longer. Precision ground from hardened and tempered M-2 HSS material.