Ratchet type ring spanner

A ratchet-type ring spanner comprising a handle and a head portion, the head portion comprising:

• a circular peripheral wall defining a receiving compartment therein and including a web area which connects with the handle, a cavity being defined in the web area,
• a ratchet wheel received in the compartment and including a plurality of teeth in an outer periphery thereof and a polygonal inner periphery,
• an arcuate toothed member mounted in the cavity and including a plurality of teeth defined on a first side thereof for engaging with the teeth of the ratchet wheel and a second side bearing against a wall defining the cavity,
• a stop member mounted in the cavity and including a first end thereof bearing against the wall defining the cavity,
• a spring mounted between the stop member and the toothed member to bias the toothed member away from the stop member, the stop member further including a pair of wings respectively extending outwardly from mediate portions of two longitudinal edges thereof in a plane substantially perpendicular to a longitudinal direction thereof.