The compact design of these OD clamps provides high clamping force and is applicable for small workpieces as small as 2.5mm diameter. The machinable, collet-shaped jaw can be machined to custom fit the workpiece. The clamp is also applicable for long workpieces by machining completely through. Indicators on the cap are guides to read the rotation degree for torque control without a torque wrench. The jaw is made from S17C steel. The cap is made from aluminum.