Specifically designed for safe, fast and efficient low voltage wire fastening. Tapered striking edge gets into close corners. Grooved guide positions wire for proper staple envelopment. Grooved driving blade halts staple at correct height to prevent wire damage. Round corner staple fits snugly around wire. Widely used in telephone, electrical, electronics and communications fields. All steel with chrome finish. For wires up to 1/4" diameter.