Code 2790 applies to employers engaged in pattern making, such as industrial patterns, shoe lasts or forms (a block or form shaped like a human foot), and tobacco pipes.  This classification does not apply to employers performing pattern manufacturing operations when the pattern is used by the same employer to manufacture a product. 

For pattern making, tobacco pipe manufacturing, prototype manufacturing and architectural scale model making, wood and plastic is cut to size, shaped, machined and assembled by nailing or gluing parts together.  It is then sanded, painted or varnished to finish.

In making metal patterns, metal stock is laid out, cut to size and shaped by milling, drilling and grinding.  Some metal patterns may be assembled onto wood patterns.