These Bosch collated steel/metal nails are designed for use with the GNB18V-12 cordless 18V Concrete Nailer. Ideal for framing, the fasteners attach metal tracks to steel. The Bosch 18V concrete nailer comes with both a 22-shot collated magazine (an extra-capacity magazine, which can hold up to 44 collated pins, is sold separately), and a single shot nose piece. The nails and the GNB18V-12 Concrete Nailer were tested and certified together (ICC). The cordless nailer is an ideal replacement for gas-powered concrete nailers, because it eliminates the need for consumable gas cartridges. The easy-to-use depth adjustment uses an intuitive sliding switch. The nails are available in three different lengths, from 1/2 In. to 3/4 In.