With the wallpaper knife you can easily cut along the plinth and ceiling, along door and window frames, around switches and the like while applying wallpaper, just like with a paper hanger's casing knife.
The handle and holder of this hand tool consist of one piece. A replaceable razor blade is clamped in the holder (4.5 cm by 2 cm) using one or more metal plates and a screw. The handle is made of wood, aluminum or plastic.
See also the paper hanger's knife. [MOT]