When removing the dedicated bag attached to the Brompton's carrier block, pulling the carrier block strap allows for easy removal of the bag. Made with 4mm paracord. Please prepare two 8mm spanners to secure the fittings. It's a double nut (the outer nut is a cap nut), so please tighten it securely with two spanners. Length: Approximately 30cm in total length #carrierblock #Brompton #reins #strap #pullhandle #reinpull