WORKPRO 16-Piece Spring Clamp Set, 3-3/8", 4-1/2", 6-1/2" Muslin Clamps for Photo Studio Backdrops Reinforced nylon constructions for tight, study and long-lasting hold. Durable pads(clamping chips) protect the finish. Ergonomic handle for comfortable grip. Package Includes: 6 PC 3-3/8" clamps, 6 PC 4-1/2" clamps, 4 PC 6-1/2" clamps. Three jaw open sizes (2-1/4", 1-3/4", 1-3/8" ) for versatile use, satisfying most of your needs. Perfect companions for your photography, backdrops, woodworking, etc. Thick pads for durability Geometric textured surface for betterfriction to clamp and fasten objects Flexible red pads,which can rotate 45 degrees,easy to move and adjust as needed while working according to irregular objects Ergonomic handle for comfortable use Fine textured surface that prevents from slip while clamping andprovides some holding power Spring is equipped with a screw for betterdurability and long service life. Ensures theclamping force