STANLEY FMHT0-83231 FM S TRIGGER CLAMPThe STANLEY FATMAX? FMHT0 83231 is a compact one handed trigger clamp (bar clamp) measuring 120 mm ( 4. 7 in) in length. It features a reinforced glass fiber nylon body, a trigger operated release mechanism for quick adjustments, removable soft jaw pads to prevent damage to workpieces, and a durable steel I beam spine offering sustained clamps of up to 15 kg and a maximum clamping force of 20 kg.