Lufkin 72 in. L X 5/8 in. W Wood Extension Rule SAE

The Lufkin extension folding rod rule is marked on both sides and edges. It has two 6" extension slides; an extension is ready to use in the first section. The graduated slide rule extends up to 6 additional inches. Stops at each end to prevent the slide from falling out. It is marked along both sides and both edges.