The Dormer A190 HSS Jobber Drill Sets features A100 HSS Jobber Drills that are ideal for general machining applications. Supplied in an attractive plastic case. A190 No.18 HSS Drill Set of 29: 1/16 - 1/2in x 64ths. Contains 15 drills. Range of sizes from 1/16th to 1/2in by 32nds. DORSET20