3-IN-1 STAPLER PISTON: D -TYPE, U-Type, T-Type 3-In-1 Staples are ideal for repairing, decorating and securing. Use the base gun knob to adjust the pressure to suit the thickness of the material you are using. ADJUSTABLE PRESSURE ADJUSTMENT KNOB: Adjustable pressure setting to ensure you get the right pressure for the task at hand. Adjust the pressure according to the thickness of the material you are working with. HANDLE WITH LOCKING: Comes with a comfortable handle and an easy locking mechanism. When not in use, secure the base gun with the handle lock for easy storage in your drawer or tool bags etc. READY TO GO: This kits provides everything you need you need to start this project in mind, with three staple types for a wide selection of applications: 1200 Nail Staples, 1200 U-Shape U, 1200 T-Shape T. SAVE WORKING TIME: The anti-jam mechanism saves working time, adopting the principle of spring spring impact, it does not need electricity or gas as the power source. Durable and not easy to damage.