Estwing 3.5-in 21-Degree Pneumatic Framing NailerDurable construction with lightweight magnesium body, 1 piece drive blade, and rubber O rings Select fire trigger allows you to quickly switch from bump fire to sequential fire Tool free depth adjust makes it easy to adjust driving depth for each project Anti dry fire prevents firing with low fasteners, and will resume firing once more are added Protective no mar tip can be removed to expose teeth that give a secure, no slip grip when firing Pro