diff --git a/EMkMachMgr.h b/EMkMachMgr.h
index 822b648..8ba3fd4 100644
--- a/EMkMachMgr.h
+++ b/EMkMachMgr.h
@@ -132,6 +132,7 @@ class __declspec( novtable) IMachMgr
       virtual bool TdbGetCurrToolParam( int nType, double& dVal) const = 0 ;
       virtual bool TdbGetCurrToolParam( int nType, std::string& sVal) const = 0 ;
       virtual bool TdbGetCurrToolMaxDepth( double& dMaxDepth) const = 0 ;
+      virtual bool TdbGetCurrToolThDiam( double& dThDiam) const = 0 ;
       virtual int  TdbCurrToolDraw( int nGenCtx, int nToolCtx) const = 0 ;
       virtual bool TdbReload( void) = 0 ;
       virtual bool TdbSave( void) const = 0 ;
diff --git a/EXeExecutor.h b/EXeExecutor.h
index ed32950..1af244e 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -783,6 +783,7 @@ EXE_EXPORT bool ExeTdbGetCurrToolParam( int nType, int& nVal) ;
 EXE_EXPORT bool ExeTdbGetCurrToolParam( int nType, double& dVal) ;
 EXE_EXPORT bool ExeTdbGetCurrToolParam( int nType, std::string& sVal) ;
 EXE_EXPORT bool ExeTdbGetCurrToolMaxDepth( double& dMaxDepth) ;
+EXE_EXPORT bool ExeTdbGetCurrToolThDiam( double& dThDiam) ;
 EXE_EXPORT int  ExeTdbCurrToolDraw( int nGenCtx, int nToolCtx) ;
 EXE_EXPORT bool ExeTdbReload( void) ;
 EXE_EXPORT bool ExeTdbSave( void) ;