The Arrow JT21CM features an all chromed steel housing, jam-resistant mechanism, proven rear load magazine, and steel working parts hardened in a 1,500 degree furnace. A rugged coil spring gives this tool the power and performance one would expect from a much larger stapler – in a smaller fine wire format. And a convenient staple viewing window indicates when staples are running low. Ideal for general repairs, professional uses, upholstery, fecorating, and crafts.