A ratchet wrench and lighting circuit arrangement includes a ratchet wrench, the ratchet wrench having a hollow ratchet driving member mounted in a box at one end thereof, a holder shell fitted into the ratchet driving member and detachably secured thereto by a screw joint, and a lighting circuit assembly installed in the holder shell and controlled to emit light through a lens at a bottom side of the ratchet driving member.

An extension bar with built-in light includes an elongate body having an open first end and an engaging recess in a second end of the elongate body. A switch member with a first conductive member extends through a transverse hole of the elongate body. A carrier is received in the engaging recess and a second conductive member is connected to the carrier. A power supply unit and a light bulb are received in the passage. The first end of the second conductive member is moved to contact the power supply unit to activate the light bulb when a conductive hand tool is inserted into the engaging recess. The light bulb is also activated when rotating the switch member to contact directly the first conductive member, the second conductive member and the power supply unit.

A tool suspension device includes a main body having a first side formed with a mounting hole and a second side provided with a mounting portion. The mounting hole of the main body has a periphery formed with a catch edge. The mounting portion of the main body has an inside formed with a mounting space communicating with the mounting hole. Thus, the ratchet wrench can be mounted on and detached from the tool suspension device easily and conveniently, thereby facilitating the user using the ratchet wrench. In addition, the tool suspension device can be reused repeatedly.

A luminescent extension is provided for connecting a box-ended wrench with a socket. The luminescent extension includes a cylinder, an upper tubular insert, a light assembly, a cover and a lower tubular insert. The upper tubular insert 11 extends from an upper end of the cylinder for releasable connection with the box-ended wrench. The light assembly is installed in the cylinder. The cover is rotationally mounted on the upper end of the cylinder between an OFF position for turning off the light assembly and an ON position for turning on the light assembly. The lower tubular insert extends from a lower end of the cylinder for releasable connection with the socket. Light can emit from the light assembly through the lower tubular insert.