Patented design snaps pipe into place before attaching to joists, rafters, or studs. Made of high-impact ABS. Nail holes on all 4 sides. Nails included. 1/2″, 3/4″, and 1″ will work with copper, CPVC, polybutylene, or PEX tubing. 1-1/2″ thru 4″ will fit Schedule 30 and Schedule 40 DWV pipe. May also be used for utility use to hang bicycles, hose, tools, etc. Packed in poly bags.