The RYOBI Heavy Duty 4-in-1 Stapler provides a 50% easier to squeeze handle and is 40% lighter for less user fatigue. Loading and unloading is quick and easy with the bottom load magazine. You have ultimate control with the high/low power adjustment for any application and the handle lock for convenient storage. The staple indicator window showcases the remaining fasteners so you are always prepared to reload. This 4-in-1 stapler is designed for heavy duty staples, light duty staples, round crown staples, and 18GA brad nails.