AES Industries 1/8" Double Ended High Speed Steel Stubby Drill Bits with Titanium Coating (12 Bit Pack) Double-ended 1/8" drill bits with a Titanium coating. Made with a high speed steel core, perfect for drilling sheet metal. Penetrates metal 3 times faster than non-coated high speed steel drill bits. Titanium coating helps reduce heat and friction while drilling. 1/8" Diameter and 2-1/4" Length with a 135 split point drilling tip.