Fiberglass handles are reinforced safety yellow that make them strong, lightweight and extremely durable. The STA-LOK® positive locking system has a patented design that allows for variable locking position with maximum locking power. The threaded metal tips are a solid aluminum-zinc alloy casting that add greater strength. It's a standard 3/4" #5 Acme threaded design. The fiberglass has a Microshield® surface that is non-stick and unique to Structron® superhandles and resists paint build-up for easier clean up. Our ProGrip™ handles feature a double-wall construction for increased durability. It also has a non-slip finish for a more secure hold.