105,262. Scott, H. L. J. April 4, 1916. Hooks.-A hook for attachment to an artificial arm can be secured at any desired inclination and has a spindle I, Fig. 7, with a projecting feather i, which passes through the central keyhole passage C<2>, Fig. 4, formed in the boss C' of the arm socket. When the feather passes the end of the boss, the fitting can be rotated and held in any desired position by releasing the spring lever D and allowing the pin E to engage one of a series of holes formed in the flange J. The hook itself comprises an L-shaped shaft, the outer end of which terminates in a hook.