The Lie-Nielsen Shoulder Plane is a full-width shoulder plane for trimming tenon shoulders and cheeks, made in Warren, Maine, in three sizes: the Small No. 041, the Medium No. 042 and the Large No. 073.
The blade can be set flush with either side of the machined body, so it trims right into the corner of a shoulder. The Small is a 5/8 in wide Preston-style plane. The Medium is 3/4 in wide, Lie-Nielsen's improved version of the discontinued Record 042, and narrow enough to reach the bottom of a dado. The Large is 1-1/4 in wide and 8-1/4 in long, based on the Record 073, which came from an early 1900s Preston design. Its bronze lever cap doubles as the handle, and a screw in the nose adjusts the mouth.
Thomas Lie-Nielsen started Lie-Nielsen Toolworks in 1981 with a single plane, a bronze edge plane based on the old Stanley No. 95, and early on made his planes in a backyard shed in West Rockport, Maine. In 1988 the company moved into the building in Warren, Maine, where it still makes its tools, about an hour up the coast from our campus.