FallTech 7534 Steel, Trailing Beam Clamp Steel - Dual Adjustment for Centering on I-Beam, Aluminum Hex Bar and Jaws, 3" to 18", Natural Aluminum alloy construction of hex bar and jaws^Lightweight design delivers demanding performance^Both Jaws center onto beam flange keeping steel D-ring on-center^Lock-nut jaws provide nearly infinite Adjustment