ChainDrive Motorsports Adjustable Arm Restraint Tethers. 3/4" Polypropylene Webbing. Black Steel Tactical Snap Hooks Make Clipping to D-Rings Quick and Easy. Adjustable Slide Buckles (Up to 16" Length) Allows Proper Adjustment for ALL Driver Sizes. Looped Ends for Easy Harness Attachment. Designed for Racing Suits with Built-In Arm Restraint D-Rings.