These OD clamps allow for holding on the circumference of slender workpieces. The aluminum jaws are designed to be machined to custom fit contoured or odd shaped parts. When the clamp is tightened, both jaws move towards the center clamping the circumference workpiece. These clamps allow for part repeatability of +/- 0.08 mm. The clamping stroke is .5 mm. The body is made from 4140 alloy steel, hardened with a black oxide finish. The jaws are made from aluminum with natural anodized finish. Clamps are supplied with locking button and locating pins.