Grizzly G9787 Caliper Micrometer Combination Square Set, 6-Piece Router bit spindle for use with our g1035 and g1035p 1-1/2 hip shapers 0001-Inch and a precision combination square with a whole list of features by itself. the square has a center finding beam a protractor beam and of co This is a great kit at a great price made for precision set-up and measuring