Internal Manual Clamps Features: Quick reliable alternative to External Line-up Clamps. Quick Line-up for continuous Welding of Pipes Screw Jack type mechanism to have adequate alignment Toggle action puts maximum power on pipe Gap is unobstructed for full stringer bead It is designed for all diameter and wall thickness of pipes Heavy duty jack box puts more power on the pipe with less operator effort IMC is available in 6 to 48 Pipes