Features: 1.Rod and Pulley Kit: These table mounting clamps come with rods, pulleys and cotton string, which offers extra support and ensures multi purpose. 2.High Strength: These metal bench clamps are made of premium metal material in high strength, which is strong, stable and highly durable. 3.Wide Application: These laboratory table clamps feature universal design that is suitable for laboratories, schools, physics teaching and testing institutions. 4.Easy Installation: These laboratory bench clamps can be easily mounted on most tables of different thickness, meeting your needs and saving your effort. 5.Simple Structure: These metal bench clamps with pulleys and rods had been carefully tested, which have simple structure and beautiful appearance, easy to use and install. specification:Item Type: Table Mounting Clamp Material: Metal Product Use: Laboratory, School, Testing Institution PackageList:3 x Table Mounting Clamp 3 x Pulley 3 x Rod 2 x Nut 1 x Cotton String