0.4061"-0.5100" (10.313Mm-12.954Mm) Black Guard™ Class Zz Reversible Go(Plus) Single End Assembly, Red Cap Go(Plus),Single End Handle,Red Cap Custom Reversibles From .0040'' To 1.0100''. When One End Becomes Worn Out Of Tolerance, You Can Reverse The Gage And Use The Other End. This Significantly Increases Gage Life. Vermont Gage's Reversible Plug Gages Feature 2" Of Actual Gaging Surface. This Is Crucial For Gaging Holes Of Varying Depths. Available Up To 1" In Several Class Tolerances And Materials To Meet Your Unique Requirements. Inch Handles Are Light Blue. Metric Handles Are Yellow. Certificate Of Accuracy Included. Vermont Gage Usa Part #164507130. At Checkout, In The 'Additional Instructions' Field, Specify The Size(S) Of Gage Member(S) And The Direction Of Tolerance. For Example: .2480" Go And .2520" Nogo. You May Also Include Up To 25 Characters Of Custom Handle Marking At No Additional Charge.