The Kliklamp is an automatic one handed bar clamp. Made with lightweight magnesium clamping arms, the Kliklamp has an ergonomically shaped ratcheting, clamping lever. To apply clamping force simply slide the ratcheting clamping arm to the work and pull on the lever handle. Ratchet action is vibration and slip proof. Produces 260 lbs. of clamping force. The 4” clamp weighs 0.7 lbs., the 8” clamp weighs 0.8 lbs., and the 12” weighs 1 lbs. Made in Germany.