features of the Inch Dial Bore Gauges: wheel guide/311-504 is with plate guide/311-505 canister/fixed or inserting anvils Inch Dial Bore GaugesNr.modelGrad.(mm)Range(mm)Depth(mm)anvilwasherssub-anvils311-503WL0420.00010.24-0.401.579 311-504WL0430.00010.40-0.70491 311-505WL0440.00010.70-1.56102 313-506WL0450.00011.4-2.4663 313-508WL0460.00012.0-6.061131313-509WL0480.00016.0-10.016651313-510WL0490. ...