Spring clamp attachment by SnakeClamp Products This Spring Clamp is the third and newest attachment for our popular Workholding SnakeClamp. It is a Pony brand spring clamp made of steel and has a very strong clamping force. The tips and grips are covered with a soft vinyl material to protect from scratching. We include our sturdy 3/8″-24 stainless steel screw for mating to SnakeClamp brand flexible gooseneck and rigid arms. It has a maximum jaw opening of 2″ as well as a reach of 2″. The overall length is approximately six inches.