Heavy-duty steel construction fastens low-voltage wires or cables up to 1/4" diameter Cushioned grip and convenient handle lock deliver safety and comfort Wire guide ensures fast, sure placement of staples. Curved driver protects wire from damage All steel construction. Uses 3/8"- 9/16" Stanley CT100 series or Arrow T-25 cable staples Limited Lifetime Warranty, Weight: 2.33 lbs., Manufacturer: Stanley Hand Tools