1/4"-1-3/8" Titanium Steel Metal Uni Variable Stepped Down Drill Bit Unibit Tool 1/4-1-3/8" TITANIUM STEEL METAL UNI VARIABLE STEPPED DOWN DRILL" BIT UNIBIT TOOL Features: 10 Hole Bit Sizes: 1/4 3/8" 1/2" 5/8" 3/4" 7/8" 1" 1-1/8" 1-1/4" 1-3/8" With 1/8 Inch Increments 3/8" Inch Shank Heat Treated HSS With Titanium Nitride Coating Two-Flute Design Made The Penetration Faster Without Chipping