These nut holders have two 8-32 nuts spaced at the required distance for mounting the great (personal opinion) 1515 rail guides that Public Missiles Ltd makes. This product also contains the required flat head screws needed to mount the guides.
The Charge Canister/Shock Cord Ties consists of two replacement canisters that can be used once the last set is no longer serviceable. These parts are compatible with any of the Mach1 BT60 bay kits.
The replacement deployment hardware is used to rebuild hardware that has been damaged or corroded. It is used with any of the 54, 65, or 75mm bay products from SMT Designs.