Abstract: A wrench assembly for retaining a pair of propane tanks in spaced relationship, while providing a convenient storage structure for a wrench required for maintenance of the propane tanks. The assembly includes a threaded rod positioned between the propane tanks, and a bracket securely retains the tanks in position when a wrench having a threaded opening is screwed onto the threaded rod. The assembly overcomes the problems associated with the misuse of tools when the appropriate wrench is unavailable.

Abstract: An apparatus for removing support and guidance rollers from an endless track vehicle so that the rollers may be repaired or replaced. The apparatus includes a tool having a base on which a generally vertical threaded shaft is mounted and such shaft may be selectively rotated to raise and lower a travelling block and such block carries a generally horizontal threaded shaft having a cradle or other support means at one end which receives and supports an endless track support and guidance roller when such roller is to be removed and replaced.