- Forstner bits feature continuous rounded edges for smooth cutting with minimal tearout. Sawtooth bits feature serrated edges for cutting harder materials such as end grain. Metric sets include bits of following approximate sizes (accurate to +/- 0.5mm): 6; 10; 13; 16; 19; 22; 25; 28; 32; 35; 38; 41; 44; 48; 51 and 54mm. Imperial equivalent sets include bits from 1/4inch to 7/8inch in 1/8inch increments as well as 1inch to 2-1/8inch bits in 1/8inch increments. NOTE: IMAGE DEPICTS 2x SETS Price is for one set only.