Wire Tacker Is Specifically Designed For Safe, Fast And Efficient Low Voltage Wire Fastening And Ideal For Wires Up To ¼” Diameter. Features A Tapered Striking Edge Getting Into Close Corners, Grooved Guide Positions For Proper Staple Envelopment And A Grooved Driving Blade Halting Staple At Right Height To Prevent Wire Damage. Manufactured For Use With Round Crown Staple Which Fit Snugly Around The Wire, Compatible With 415.8796, 415.8812 Or 415.8846 Staples And Great For Use In Telephone, Electrical, Electronics And Communications Fields. To Use, Simply Load (85) T25 Staples With A ¼” Crown-Divergent Point Of .050 Wire In 9/32", 3/8", 7/16 Inch Or 9/16 Inch Leg Lengths. Product Is Sold Boxed.