[Protective Clamp Blocks] The flat head movable clamp blocks are designed to protect your workpieces from damage. [Sturdy and Reliable] Inspired by bridge engineering the thickened clamp body features a solid structure that resists breaking. [Easy to Use] With just a single press of the button these spring clamps open and close smoothly. [Durable Construction] Crafted from high strength nylon reinforced with fiberglass these spring clamps are built to last. [Powerful Ratchet Design] Featuring a unique ratchet mechanism these clamps deliver stronger clamping force with ease., Manufacturer: Jelquix