The GTH is a gas-actuated top-hat pin designed to fasten building components, such as cold-formed steel framing members, to concrete. The versatile GTH consists of a 1" smooth-shank pin and aluminum top-hat washer for fast loading and centering of the pin in the nosepiece of the tool. The GTH is for high-volume applications and can be used with common powder-actuated tools for fastening into harder substrates (structural steel or extra-hard concrete) when required.