16 piece set 1/16 in.-7/32 in. by 64ths, 1/4 in., 5/16 in., 3/8 in., 1/2 in. Pilot point tip starts on contact and reduces lockup on break through. No-spin shank, tapered web. Size markings above the shank. Includes die stock, tap wrench, collet, in a me