3-in-1 Application - It fits 3 kinds of different staples/nails such as D type staples, U type staples and T type nails. It's suitable for general models: T50, T18, Brad nail gauge 18. More Accurate Positioning - The staple gun features three specific staple outlet laser-etched marking, which helps users more clearly know the outlet position of staples and then more accurately fasten objects. Knob Stepless Adjustment - Unlike high/low dual power adjustments, the Stepless knob adjustment allows for much more levels of power adjustment. It allows the user to set different pressure depending on the desired effect of the stapling. Easy to Use and Comfortable - Equipped with a jam clearing system that allows for the quick removal of stuck staples. Its anti slip comfort grip also gives comfort to the users palm which reduces the pain while doing heavy/continuous work. Cost-effective Kit - Includes an all-metal 3-in-1 stapler gun, 3000PCs staples and a staple remover. Staples including 1000PCs 8mm D-type staples,1000 PCs 12mm U-type staples (T18); 1000 PCs 10mm T-type staples(Brad nail gauge 18). The set will meet your most needs. Perfect for a wide variety of applications: general DIY repairs, crafting, decorating, upholstery projects, roofing, and more. Size range of applicable staples - D type (T50): 4 - 14mm; U type (T18): 10 - 12mm; T type(Brad nail gauge 18): 10 - 14mm. Kelvenix 3000x Staples Staple Gun Heavy Duty Tacker Stapler Upholstery Nail Gun