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.