A knife can slip on a flat ruler and cut you.
The Steel Edge Rhino Ruler has a guard that prevents the razor from accidentally slicing you.
Specifications:Comfortable No Pinch Safety GuardExtra Wide 3.6" Base
Chromium Steel Cutting Edge
Tough Red Baked on Powder Coating
Newest High Tech Super Grip Backing....Patent # 9769673
Free Custom Cut Sizes Available
28" Steel Edge Rhino Ruler