The CHIEF™ 17-1/2 in. Professional Extra-Long Air Hammer Chisel Set delivers extended reach and durability for demanding applications. With its heat-treated chrome-moly alloy steel construction and black oxide finish, this set offers enhanced strength and corrosion resistance. This chisel set is ideal for mechanics, technicians, and metalworkers, and is compatible with all standard air hammers. The chisels work well for cutting, scraping, and punching in tight or obstructed spaces.