Durant Tool Company Stock Straightener. Model SS-18. Serial 1971. Width is 18 in. (2) drive rolls, (9) straightening rolls. 2 in. dia rolls. Thickness range is .20-.094 in. The SS series is a un-motorized stock straightener. These units are ideal machines for either manually straightening materials with a hand crank or automatic pull through operations. Overall dimensions: 41 in. L x 33-1/2 in. W x 43-1/2 in. H.