Based on the Stanley No. 48 and 49, our Tongue and Groove Planes are more heavily built for sound performance with a very thick blade. Also, rather than having two separate blades, ours is a single forked blade that registers on the milled body casting to ensure squareness and equal depth of cut on both sides. Since this is a heavy stock removal tool, no fine depth adjuster is needed. The blade is 3/16" thick O1 steel. The fence is attached to the base with a center pivot screw and can be rotated and locked in tongue-cutting or groove-cutting positions.
The No. 48 centers on ¾" stock, leaving a ¼" wide tongue and .3125" deep grooves. On narrower or wider boards, the tongue will be offset from center, but still hidden within the joint. 2.90 lbs.
The No. 49, a companion Tongue and Groove Plane, is made to center on ½" stock. It will cut a .166" wide tongue and .230" deep grooves. 2.35 lbs.