Lufkin 680D is an inside micrometer with a range of 1-1/2” to 32”. This set is in very good condition with no rust. Both micrometer heads have smooth movement.
This Lufkin set is the EXACT same as the Starrett 823FZ. All components are interchangeable between the two brands.
features .001" graduation, with 10 rods and handle, 1-1/2-32" range, and 1/2 and 1" movement of screw. 1 1/2-32" Range with 10 Rods/Handle, with Case screw.