Acme Staple 654018B 18A Staple Gun with Bottom-Load Magazine for Crown, 3/16" Jam less design and unique loading system makes Acme staple guns faster, safer, and more reliable than ever before Interchanges with Arrow model T-18 3/16-inch crown Accepts 3/8-inch, 7/16-inch and 1/2-inch staples Limited lifetime warranty