Fasco ESBNK-4023-06 21-gauge Galvanized 1/2" Crown Fine Wire Staples with 1/4" Leg (10000 per Box) For Use In: FASCO F1B 84-16; Bostitch TU20-7, Bostitch T27-7 For Use In: FASCO T28-11; Bostitch T31-2, Senco JN2330 Crown width: 1/2-inch; Leg length: 1/4-inch Chisel Point; Galvanized