adapted to accept replaceable tips 116 designed to grip and thereby turn standard hexagonal nuts while the drawings show a round shaft 114 in this embodiment the shaft 114 may be and is preferably polygonal square in cross section when a non round shaft 114 is used drive mechanism can be modified to obviate the drive tabs 132 as the shaft 114 can be fitted in an appropriately shaped hole to receive the limited torque loads of this embodiment in this embodiment the shaft 1 14 has been modified by changing the cross sectional shape to a rectangular tube or a u201c c u201d shaped channel as shown more clearly in fig6 the replaceable tip commonly called a crow foot wrench 117 has been placed into the shaft 114 the crow foot wrenches 117 are designed to be placed on the end of a square drive wrench or extension as evinced by the square recess 119 formed therein and be used to access standard sized hexagonal nuts in otherwise inaccessible restricted spaces it has been discovered that the crow foot wenches can be gripped by the outer edges and used as a replaceable tip on a linear wrench functioning much like a variable length open end wrench the shaft 114 is rectangular in.