5 Pack, Pierce N Clamp, No Tools Required, Fits Any Standard Supply Tubing, 710", 1/2" Or 5/8", Easy To Install, A Simple Hand Maneuver Will Snap This Piece In Place, Puncture The Supply Line & Be Ready To Add Feeder Lines, Eliminates The Need For A Hole Punch & Connectors To Get The Water Flowing, Attaches Directly To The Feeder Line, Bag.