Arrow Fastener 505 2 Pack 5/16in. T50 Heavy Duty Staples, 1,250 Staples Per Pack 5/16-Inch Staples 1,250 Staples per box Fits many Arrow models and brands such as Powershot, Craftsman, Ace, Master Mechanic, and Stanley Fit the following Arrow staple and/or nail guns: T50, T50PBN, T55, ET50, ET50BN and ET50PBN 2 boxes of 1,250 staples per box ( Total 2,500 Piece staples )