Detailed Product Description Single flute tapered drill bit, made in standard size ... to match most popular wood screws, with one sprial flute is suite for softwoods. The general purpose type ... used in a drill or other stationary equipment. Single flute tapered drill bitsSize(mm)Qty (sets/CTN)Means ( ... 3.5,4,4.5,5,5.5,62020*18*308.5/7.5Model 23,4,5,6, ... 11/64,3/16,13/64,7/32"2020*18*308.5/7.5Model 61/8,5/32, ...