Really Right Stuff KRG Whiskey-3 Chassis Plate are specifically crafted for various precision machined rails, chassis, and stocks, and are made from solid aluminum blocks. They are fully compatible with Arca-Swiss style quick-release systems. KRG Whiskey-3 Chassis Plate Features: Made with aluminumCompatible with RSS quick-release clamps and headsNon-slip mounting point Really Right Stuff KRG Whiskey-3 Chassis Plate BW3-XR in Black