Speed Bow Introductory Compass

This Alvin 6½" Speed Bow compass has smooth action rapid adjustment feature, durable cast zinc construction, black fiberglass crown and reinforcements. Features double knee joints for parallel leg positioning and precise drawing of large radii.

Makes circles up to 12" diameter. This is a durable and economical compass for introductory level drafting and drawing requirements. Comes in a clear top protective plastic case with spare lead.