A socket wrench includes a handle (10) having a housing (12), a drive shank (13) having a ratchet wheel (131) mounted in the housing, two pawl members (16) engaged with the ratchet wheel, a switching member (15) located between the pawl members, two elastic members (S) each biased between the housing and the respective pawl member, a control knob (14) connected with the switching member, a driven arm (21) having a mounting sleeve (20) and an arcuate mounting slot (22), a connecting plate (17) provided on the handle, and two driving arms (18; 19) provided on the connecting plate and received in the mounting slot. When in use, one of the driving arms drives the driven arm by a leverage to drive the drive shank to rotate a socket (30a) to operate a workpiece in an energy-saving manner.

Disclosed is an auxiliary wheel comprising a wheel hub and a tire. The auxiliary wheel is fixedly mounted on a wheel of an automotive vehicle in a manner that the auxiliary wheel and the wheel have a common rotary axis. The auxiliary wheel may further comprise one or more locking components located on the wheel hub, and the locking component is used to fix the auxiliary wheel on the wheel hub of the wheel, so that the auxiliary wheel is driven by the wheel hub of the wheel. The present invention further relates to an unassisted lifting jack used when the auxiliary wheel is mounted. The unassisted lifting jack comprises a climbing block and a supporting block connected in a rotary way, the climbing block and the supporting block have a common supporting bottom, and the climbing block has a slope provided to the auxiliary wheel for climbing.

A spanner (1) for bolts (7) is described, which comprises a first substantially straight element (2) and coupling means (5, 6) with the bolt (7). One end (22) of the element (2) is pivotally coupled with one end (31) of a second intermediate element (3) in turn pivotally coupled, with a second end (32) thereof, with one end (41) of a third element (4) intended to accommodate said coupling means (5). (Fig. 4).

A wheel brace for tightening and loosening of vehicle wheel nuts and incorporating at least one pair of drive heads or socket heads (11, 6) for co-operation with or engagement of a wheel nut. The socket head (6) may be located selectively at either end of an unequal L-shaped bar (14) enabling the brace to be gripped at (12) or (13) for the respective loosening or tightening of wheel nuts. A one-way ratchet mechanism (15) is adapted to be locked in the wheel nut loosening direction but is free in the wheel nut tightening direction preventing use of the longer length bar to tighten the nuts. A jack-driving attachment (9, 10) may be provided and attached in place of socket head (6). The wheel brace may comprise several separate parts attached or attachable together to provide the appropriate L-shaped configuration such that a nut loosening torque may be approximately twice the available nut tightening torque.