1.specification of lifting clamp(vertical lifting clamp,pipe clamp) capacity:3T, jaw capacity :50-180mm,mouth depth:245mm, pressure line:175mm, weight:18kgs 2.function of lifting clamp lifting clamp is for the vertical transport of concrete pipe and culvert, it's three ledged lifting system for the safe and non marring transport of pipe of dia.2000mm and a load up to 3T the jaw capacity is designed for pipe thickness from 40 to 220mm with light weight design and for heavy duty use 3.has been GS tested and approved byTÜV