We carry a collection of black Duraflex® plastic strap adjusters in sizes 3/4", 1" and 2". Our strap adjusters are typically used on backpacks, shoulder straps, webbing, and more. We also carry a heavy duty strap adjuster that can withhold increased weight and pressure. The installation simply requires threading the webbing or strap through the locking double bars and tighening. These are also often used with our black plastic d-rings.