Lab Essentials With Prong Style, Grip Size and Material Options Our Multi-Purpose Clamps are designed to securely grip and position laboratory apparatus. Extension arms with a 360° rotation allow placement of apparatus at various distances from lab-frame without compromising experiment integrity. Swivel & fixed position clamps hold apparatus near the lab-frame or stand, and have a built-in integral holder for attaching to lab-frames or apparatus. Available as single or dual-adjust in zinc or stainless steel.