AntiJam´┐Ż technology eliminates frustrating staple jams. Antimicrobial compound safely reduce the growth of bacteria, viruses and mold. Steel with rubber pads on base. Adjustable paper stop with standard and metric rulers. Throat depth adjusts up to 2 3/8". Rear loading of 1/4", 3/8", 1/2" and 5/8" heavy-duty staples. Stapler Type: Heavy-Duty Desktop; Staple Capacity: N/A; Size of Staple Used: 1/4 in; 3/8 in; 1/2 in; 5/8 in; Type of Staple Used: Heavy-Duty; Chisel Point.