Security Chain Company's Peerless Chain Quik Grip V-Bar CAM tire chains feature a small 'V' of low carbon steel material, which is welded onto each link for added traction and durability. These are also CAM chains. CAMs are pieces of stamped steel that are placed on the outside rail of the tire chain. The keyhole on the CAM allows a tool to be inserted and turned, which takes up slack in the chain.