Check the listing for details. Weaver Leather Curb Strap - 5/8” Black Nylon with 4 1/2” Flat Link Chain and. Color: Black, Condition: New. Listed at 11.47 USD. The Weaver Leather 5/8" Black Nylon Curb Strap with Flat Link Chain is a workhorse addition to your tack room, designed for riders who value clear signals and low-maintenance gear. Whether you are working on a soft feel in the arena or need dependable response on the trail, this strap ensures your bit functions exactly as intended by providing consistent pressure to the chin groove.