Swanson Big 12 Speed 12 In. Aluminum Rafter Square Black & Decker Key from exterior and turn

Key from exterior and turn handle clockwise from interior will lock or unlock exterior knob or interior knob

5"(W)X16"(H)X14

and works well when adding smoking chips and chunks to add a variety of flavor profiles

Coating is ultra-clear film quality virgin HDPE (High Density Polyethylene) for maximum elasticity and light emission

Outside knob always fixed

Swanson Big 12 Speed 12 In. Aluminum Rafter Square Black & Decker Key from exterior and turnCast aluminum alloy. Measures 12" x 12" and 17" across the diagonal, which is marked off in degrees from 0 deg. (degree) to 90 deg.. Features scribe bar, notched every 1 4", to lay out parallel lines. Lay put bar adjusted out to fit out of square corner. 2 adjustable stop pins can be set for proper run and proper rise. Includes Blue Book of Rafter Length and Roof Construction.