The GX 100 system, including the GX 100 tool, gas can and full line of fasteners features repetitive fastening on standard, aging or hard concrete, concrete block and steel with ease and remarkable speed while achieving fastening results second to none. Because it is gas-driven and has no battery to charge, it's always ready to start. Collated nail strips are available in six sizes from 1/2 to 1 5⁄8 inch. The tool has ample power to drive the company's precision engineered, state-of-the-art fasteners, which feature a thicker shank for higher holding value. The dome-shaped head of the fastener, coupled with the GX 100's recessed piston, provides better guidance to eliminate waste. With the tool's fastening quality and optimized center of gravity, one can fasten overhead or horizontally into steel or hard concrete with ease and confidence.