Precision HM-1100W HINGE-MATE Hinge Mortising Kit - 3/4" to 5" Hinges, 1/4" Radius Router Bit Aluminum Fixture Easily Attaches To Door Or Jamb For Hinge Mortise and works with the Lock-Mate Hinge Size Range 3/4" To 5". 1/4" Radius. Maximum Door And Jamb Thickness 1-3/4" Replacement Radius Bit (Pre1100-018) And Radius Bit With Shank (Pre1100-018A) Available.