- Klutch Titanium Drill Bit Set - 145-Pc. Titanium-coated bits last up to 6 times longer than standard bits 29 titanium-coated high speed steel fractional drill bits: 1/16in., 5/64in., 3/32in., 7/64in., 1/8in., 9/64in., 5/32in., 11/64in., 3/16in., 13/64in., 7/32in., 15/64in., 1/4in., 17/64in., 9/32in., 19/64in., 5/16in., 21/64in., 11/32in., 23/64in., 3/8in., 25/64in., 13/32in., 27/64in., 7/16in., 29/64in., 15/32in., 31/64in., 1/2in. Titanium-coated high speed steel number drill bits from #1 to #60 26 titanium-coated high speed steel letter drill bits, from A- Z 30 titanium-coated high speed steel replacement bits in popular sizes, #41-#60, stored in plastic pouch: #41, #42, #43, #44, #45, #46, #47, #48, #49, #50, (2) #51, (2) #52, (2) #53, (2) #54, (2) #55, (2) #56, (2) #57, (2) #58, (2) #59, (2) #60