The principle of the ratchet wrench

A ratchet wrench for rotating bolts or nuts placed in tight or inaccessible locations, the ratchet wrench is rotatably attached to the end of the lever. The ratchet wrench comprises: a weight connected with an operating rod, the weight can slide along the length direction of the operating rod, and a front weight bearing part is provided on the operating rod at the front of the weight to block the impact of the weight. Alternatively, there is a rear weight bearing portion on the operating lever at the rear of the weight that blocks the impact of the weight. Also, the lever may have both a front weight bearing portion and a rear weight bearing portion