Surebonder 55999 No.4 H.D. 1./4-Inch, 3/8-Inch, 1/2-Inch, 9/16-Inch Staple Variety Pack 5000 staples in 4 different sizes Fits Arrow T-50 Type Staplers, Sure bonder Narrow Crown 9600, Powershot, Stanley And Many Others! Contains 1,250 Staple of the Following Lengths: 1/4-Inch, 3/8-Inch, 1/2-Inch, 9/16-Inch Heavy Duty Staples Are Electroplated-Zinc Coated For Moisture And Rust Resistance. Contains 1 Each of Sure bonder Models: 55014, 55038, 55012, 55916