Arrow Fastener HT55BL Hammer Tacker Lightweight design Professional quality tool Convenient quick load magazine Lightweight design with patented quick load magazine make this a perfect tool for all day use Ergonomic soft rubber grip provides maximum comfort to prevent sore hands Visual refill window shows the user if they have staples loaded Uses Arrow T50 Heavy Duty Staples up to 3/8" (1/4", 5/16", 3/8") Chrome-plated steel housing