Description Easily unmount your bag from the Brompton front carrier block with our handmade leather release strap. No more fumbling around trying to find the latch by feel! Quick and easy to attach–all you need is a flathead screwdriver and (optional) a pair of pliers. About the Materials Leather The leather pull strap is made of Italian vegetable-tanned leather. It’s a beautiful hard-wearing leather that is thick, strong and will become more supple over time from use. Hardware Securing the strap to the block is a solid brass screw, nut and washer to protect against the elements and keep rust at bay.