Patent ID: 8117948

Claim:
A wrench comprising: a handle portion; a head portion releasably secured to said handle portion; a release device; said head portion having an inner surface that defines a fastener receiving aperture having a plurality of fastener engaging surfaces and a side entry to said fastener receiving aperture and being movable relative to said handle portion between a loading position in which the side entry is open to permit an elongate member attached to a fastener to be moved into said fastener receiving aperture to permit said fastener engaging surfaces to be moved into engagement with the fastener by relative movement of said head portion and fastener in a lengthways direction of the elongate member and an operating position in which said side entry is closed and said head portion is operable to close said fastener engaging surfaces around the fastener received in said fastener receiving aperture in response to a torque applied in a predetermined direction using said handle portion; and said release device being arranged to apply a release force to said head portion to at least assist in releasing said head portion from said handle portion to permit said head portion to be separated from said handle portion.