Arrow Fastener ET155 ProShot 3 Electric Heavy Duty Staple Gun Uses Arrow ET155/ET150 (3/8, 1/2, 9/16) as well as narrow crown staples from Duo-Fast (5/16, 3/8, 1/2, 9/16), Stanley-Bostitch (9/16) and Crain (9/16) Heavy-duty professional tool with a generous 10-foot power cord and 12 amps of power when you need it Features a trigger safety lock, penetration adjustment dial, and a 7/8-inch extended nose Includes durable blow molded case Easy access to staple chamber