Nice STARRETT No. 257D Surface Gage With 7, 12 & 18” Spindles And Scriber Read. The 18. spindle is a threaded two piece spindle which you can make a 7.5” spindle by using just the top part of it for short project. Or put it together for a full 18 spindle . It also comes with a 12 “spindle. Snug and scriber included. See pictures for details.