Lightweight die-cast aluminum housing design for durability. Anti-jam magazine prevents jams and misfires. Heavy-duty stapling mechanism for durability. Surface guard to prevent damage to underlayment material. Ergonomic design is weighted forward for comfortable use. Uses DeWALT® DWHTTH700 series heavy-duty staples, available sizes of 5/16 in (8 mm), 3/8 in (10 mm) and 1/2 in (12 mm), also uses same range of Stanley TRA700 series heavy-duty staples plus Arrow T-50 heavy-duty staples.