Sioux Chief 551-2PK2 10-Count 1/2-Inch CTS Polyethylene Tube Strap This item is Sioux Chief 551-p2pk2 Clamp Full1/2"w/nail10pk Used for Handtools & Tool Organizers, Clamps The product is manufactured in United States Allows tube to expand and contract Isolates tube from surface to reduce head loss and noise transfer Nail locks tube into hanger Will not damage tube if over driven