Take your work to the next level with Alvin's TOM Drafting Machine. The vertical, sliding-track drafting system glides on precision ball bearings and the break lever can be set in three positions. Two sets of Plexiglas scales are included with the 150-degree double-hinged drawing head; one set is metric and the other is in full- and half-inch graduations. Adjust the board stand to 0-, 20- or 45-degree angles. Use the carrying case to protect the straightedge and for easy transportation.