8 Heavy Duty PowerCrown Tacker Breathable AntiJam magazine. Patented easy squeeze mechanism. Lightweight diecast aluminum design. Steel handle with over molded rubber grip for comfort. Convenient bottom loading for quick and easy reloading. Nickel chrome plated steel magazine and core provides smoother, more durable sliding surface for staples. T6-8 only takes Bostitch STCR5019 Series (1/4” – 9/16”) staples.