Surebonder 55212 Heavy Duty 1/2-Inch Length Round Crown Wire Tacker Staples, Arrow T25 Type, 1000 Count .305" Round Crown, 1/2" Leg Length Fits models: Surebonder 5645; Arrow T2025, T25K, ET2025; Stanley CT10X Use for stereo wires, telephone wiring, computer wires, etc. Not for use on high voltage wire or cable Steel Material