Large grip adjustment range , Made of Zinc-alloy 3 Prong Jaw Clamp | 90mm Lab Jaw Clamp | USA Lab Package include:Heavy-Duty 3 prong dual adjust extension clamp. 3-Prong Dual Adjust Fixed Position Clamp Rubber Coated Clamp Lab Clamp 3 Finger Adjust Jaw With Scientific Extension Adjustable5655 Zinc Alloy Lab Clamp 3 PVC Coated jaws adjust extension clamp QWORK Adjustable Lab Clamp with 3 Prong Finger Design and Scientific Extension - Reliable Bosshead Clamp Holder, Laboratory Stand Clip, 2 Set Add to cart 3 finger clamp accepts rods up to 20 mm, 3 prong dual adjust extension clamp Labs Clamp Retort Maximum width of Jaw opening is 90mm,extension clamp Covered jaws for protection and grip,Holds Irregular Shapes Easily 3 Rubber Coated Prong Jaws Strong die-cast construction,Made of Zinc-alloy, for laboratory Used for beaker clamp, test tube clamp, burette clamp, condenser tube clamp.