Step Drill Bit Set 5-Piece Titanium-Coated High Speed Steel with Automatic Cente
Material: High Speed Steel Body, Titanium Coating. Center Punch Specification Drill Bit Specification 10-Step 3/8" Drill Bit from 1/4" to 1-3/8". 11-Step 3/8" Drill Bit from 3/16" to 7/8". 9-Step 3/8" Drill Bit from 1/4" to 3/4".