Date: 12/31/1969 Views: 5036
Date: 07/09/2006 Views: 4982
Date: 08/04/2013 Views: 8357
Date: 08/23/2023 Views: 725937
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!