Sliding pocket clip. Pocket clip can also be used as depth gauge. Standard equivalent table on reverse side.
Mechanics Best TR25353 Stainless Steel Pocket Ruler Tools 6" Inch
Vintage General USA 6 Inch Metal Stainless Steel Pocket Ruler USA 6”
Snap On SPP380 6" Long SAE/Metric Stainless Steel Pocket Depth Gauge Ruler
Kershaw Shuffle Multifunction Pocket Knife (8700) with 2.4 In. Stainless Steel B
Kershaw Grinder Folding Pocket Knife (1319); Stainless Steel Tanto Blade
5 in 1 Keychain Pocket Multi-Tool Stainless Steel