Max SN883RH SuperFramer 20-Degree Strip Framer Anti-double fire trigger (us patent 5597106) Maintenance free end cap filter (us patent 5637125) captures dirt and sand down to microns but lets oil and air into the tool; filter keeps inside parts clean and lasting longer than competitors tools with out filters Only 11-7/8-Inch tall to fit between 16-Inch on center framing easily