Max SN883CH28 SuperFramer 28-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 12-1/4-Inch tall to fit between 16-Inch on center framing easily