Date: 12/31/1969 Views: 5749
Date: 11/29/1999 Views: 6574
Date: 09/27/2009 Views: 5740
Date: 08/23/2023 Views: 803991
Straight edges. Ones on left with holes have cork backing, keeps straight shape better. Without cork better for checking curves. Besides Isopropynal removing witness marks on Andair gasculator, it also does a fine job on some rulers!