In 1948, Joseph Struhl pioneered an innovative do-it-yourself sign kit for retail merchants. Die-cut letters and numbers made from flexible sheets of vinyl with the ability to adhere to smooth surfaces by static electricity; his “Magic Master Interchangeable Sign Kits” became a great success.

Jeff Levine has paid tribute to this innovative method of in-store advertising with Sign Maker JNL. Because of their die-cut shapes, the design style of the static cling letters have unique characteristics. Companion fonts (based on other Struhl sign kits) are Cling Vinyl JNL and Cling Vinyl Clear JNL.