Twin Tube Talons with shorter 1-5/8" nail. One talon size fits pipe sizes: 1/2" through 3/4". Compatible with PEX tubing, copper pipes and CPVC pipes. Can be used to secure tubing/piping to wooden surfaces,such as joists, studs, beams, subfloor, etc. Protruding nail length (wood penetrating depth): 5/8"