Featuring an internal piston catch mechanism, the porter cable 3-1/2 in. Round Head Strip Framing Nailer provides the power to drive nails up to 3-1/2 in. into engineered lumber. The nailer's compact-body design and inline, hard-coat anodized magazine offer balance while its bypass nail pusher provides fast reloading for your convenience. This unit's depth of drive adjusts with no tools required so you can properly set the nail heads.