Unique integral structure, the magazine is integral to the gun body, with steel top cap, this staple gun looks like a hammer, strong and reliable Only 2.0 lbs, compact, lightweight and well-balanced for ease of use High capacity magazine holds 125 staples and offers incredibly easy drop-in loading for fast on-the-job refills The Fine Wire Staple Gun drives 21 Gauge staples with 1/2-Inch crown from 1/4-Inch to 5/8-Inch length Great for construction and home repair projects: fabric, upholstery, vinyl, window treatments, light duty wood assembly, & much more.