All steel construction. Comfortable vinyl grip. Spring-loaded handle for easy rivet loading and ejecting. Extended nose for hard-to-get-at places, Locks when not in use. Used on aluminum, canvas, metal; also for installing, repairing and 1,001 uses. Includes 4 nose pieces with wrench. Use 4 rivet sizes: 3/32 in (2.5mm), 3/16 in (5mm).PROFESSIONAL - ``E-Z PULL"