Titan 1/8 inch to 1/2 inch 1 Step Drill Bit features a titanium-coated high speed steel with a one step drill bit. It includes: 1/8 inch - 1/2 inch 16501. It has a titanium coating that extends the life of the bit. The drill comes in 13 different sizes with one bit: 1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 13/32, 7/16, 15/32 and 1/2 inch.