This wiring tacker staple gun is specifically designed for safe, fast, and efficient stapling of low voltage wire up to 3/16"Diam. Features include all-steel construction with chrome finish; tapered striking edge that gets into tight corners; grooved guide that positions wire for proper staple envelopment; and grooved driving blade that halts staple at right height to prevent wire damage. Wiring tacker uses 3/8" and 7/16" round crown staples that fit snugly around wire. Warning: Some dust created by using this tool contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Made in USA. Home Improvement,Tools,Hand Tools