Gaebel Center Finder Rulers, Gaebel Zero-Center Rulers - GraphicSupplies101
12 Incra Centering Rule Rockler Woodworking and Hardware
24 Center Finder Rule. Graduated in 1/32 on top and 1/16 on bottom. Locate exact center between any two points.
24 Center Finder Finding Ruler Centering Tool Rule
iGaging 86507 Heavy Duty Center Finder Ruler
This 5-pc Wiggler / Center Finder Set is a great tool for setting mill / drill spindle alignment over center punch marks, existing holes and edge finding. Includes indicator holder, ball contact (0.250), wiggler body, disc contact (0.100) and needle point shaft.
Grizzly T10087 - 5-Pc Wiggler/Center Finder Set
WoodRiver - Stainless Steel Center Finding Rule - 24
Woodpeckers Woodworking Rules
Combination square - Wikipedia
Center Finding Ruler
StewMac Shop Rule - StewMac
Centering Ruler 24” Inch Woodworking or Embroidery Center Finder – DeadwoodCraftedTools
Rulers BLICK Art Materials
Stainless Steel 24 Center Finding Ruler