【Excellent Quick Release Function】 This 4-inch ratchet clamp set can hold workpieces quickly and accurately. The trigger design allows for easy one-handed operation, and the sliding arm holds wood securely in place. Features include a quick-release trigger clip, an adjustable soft PVC pad for proper positioning, and a ratchet mechanism designed for precise clamping. 【Sturdy Construction and Materials】 The one-handed clamp is made of plastic and aluminum alloy, making it sturdy, durable, and long-lasting. The new handle and trigger design allows for easy one-handed operation, and the flexible yet robust construction makes woodworking easier. 【Easy to Use】 This convenient bench clamp bar can be operated with one hand. Simply squeeze the trigger repeatedly until the desired clamping force or distance is achieved. The triggers function the same way when converted to extended functions. 【Practical Woodworking Tools】 You will receive four 4-inch wood clamps. The maximum clamping distance is