Constructed from high-tech resin material, they are strong, lightweight and durable. Soft pads protect work surfaces. Positive locking action to hold work tight. Can be used with one hand. Ideal for clamping small and odd shapes securely. Applies gradual even pressure. Quick-release trigger lets go with a squeeze. Smaller, for tight work spaces. Throat depth of 2-7/16 in. Includes two #546 ( 693.4822) bar clamps.