1/4 in. Steel Heavy Duty Staples (1,250-Pack) 1/4 in. staple leg length 3/8 in. crown width 1,250 staples per pack These staples can be used with Stanley TR110, TR150, TRE550, PHT150 and PHT250, Dewalt DWHTTR130LH, DWHTTR350, DWHTTR410 and DWHTHT450, arrow T50 and HT50