Slide adjustment for throat depth allows settings from 1/4 to 5/8 inch (6 to 16 mm) depth. Easy one-hand operation. Ideal for crimping gutter end caps in place. Also creates locking tabs in light sheet metals for joining metal sheets or inserting into rolled edge of utility trim. Formed metal cutting jaws and handles are made of hardened stampings. Rust resistant nickel plate and black oxide finishes ensure long service life.