These spring clips clamps are made of reinforced nylon, which made the construction more stable.These spring clips clamps are made of reinforced nylon, which made the construction more stable The serration inside the clip can increase the clamping force and frictional force, more stable. The orange adjustable chuck can change the angle according to the object, which can effectively protect the surface of the working object from damage. Product Name: Nylon Spring Clamps Color: Black Material: Nylon + Plastic Size: As Pictures Shown.