Manufacturer Of Cylindrical Plug & Ring Gages. Steel Plugs From .010 To 1.101 2" Lg. & Longer Available. Trilock Style .750 To 6.010. Steel Rings From .050 To 5.510 & Carbide Rings From .070 - 1.510. Progressive, Taperlock, Square, Hex, D Shaped, & Double D Shaped Style Available. Chrome Plating Upon Request. All Gages Can Be Certified Or Calibrated Traceable To NIST