GUN STAPLES ONLY 3/8" ARROW. This Arrow fastener is tough and contains 3/8-inch clamps. It can be used for different household projects both light and heavy. A differential is that this product can fit in different models of Arrow and other brands. It is compatible with T50, T50HS, T50X, 5700, T50PBN, T50R.ED, HT50, HT55, HT55BL, HTX50, PT50, T50ACD, T50AC, T50DCD.