the second arm 20 and a free end portion 32 of the rotation link 24 each has a transverse aperture therethrough for connection of the second arm and the rotation link to a tool using selectively removable attachment pins 33 a and 33 b respectively the attachment pins 33 a and 33 b are insertable in the apertures to pivotally connect a conventional tool to the second arm and the rotation link when using a conventional tool this permits the tool to be rotated about the attachment pin 33 of the second arm 20 upon movement of the rotation link 24 relative to the second arm as a result of extension or retraction of the hydraulic cylinder 30 to rotate the tool in the arm rotation plane defined by the first and second arms 14 and 20 a quick coupler or other mounting means may be used to connect the tool to the second arm 20 and the rotation link 24 in an alternative embodiment not shown the links 24 and 26 are not used and the hydraulic cylinder 30 is directly attached to the tool to be rotated as illustrated in fig1 the tool assembly 10 comprises a first tool which in the case of the illustrated embodiment is a bucket 34 the bucket 34 has a forward working edge 35 extending laterally generally transverse to the arm rotation.