The CLAMPTEK's CH-Mxx series feature a holding capacity from 19,600 to 35,280 N, size from 2" to 6", hardness of HRC38°±2, phosphate treated surface, and are made out of AISI 4140 chromium-molybdenum alloy steel. They also feature handle opening from 59 to 160 mm, and weight from 0.32 to 2.17 kg.