Description: The most popular staple gun ever the T50 is the choice for industrial and DIY users alike. The Arrow T50 staple gun uses many different sized staples; T50 6mm, T50 8mm, T50 10mm and T50 12mm. Also available for the T50 are three types of staples, steel, stainless steel and monel each of which will fire through your T50 staple gun with ease.