The Black Hole Practice is designed to be high quality, lightweight, and affordable. Lightweight enough to move around the yard and set up any shot you want to practice, yet durable enough to take the continual use. 24 CHAINS - Professional quality design oriented for zero weak pockets - reducing cut throughs and pole bounces. Built to standard PDGA Height & Size Regulation. Assembles or disassembles in under a minute. All-Metal construction with a unique threaded tension connection design.