Arrow Fastener Tt21 Staple Gun Turaco. Truck Light Duty Forward Action Stapler features a premium performance with user friendly forward action design and comfortable ergonomic grip. Ideal for home projects: home décor /decorating, quick repairs, crafting/hobbies. Fires J21 staples in three sizes up to 3/8" (10mm). The Arrow TruTac TT21 is a handy light-duty forward-action stapler that comes in handy for many household projects. Use it to create home decor make quick repairs put the final touches on your crafts or for other common projects. It is also ideal for use in the office. The direction of the handle on the stapler is reversed so you press down right over the point of impact. This makes it easier to staple and allows you to use your body weight to put pressure on it. The lightweight design features a soft ergonomic grip for comfortable handling. Forward-action technology makes this Arrow Truck stapler easier to use more precise and with better control. Additionally the visual refill window shows you if it has staples loaded without having to open it. It uses Arrow JT21 staples in 3 sizes: 1/4 (6mm) 5/16 (8mm) and 3/8 (10mm)