Patent ID: 8176818

Claim:
A rotary tool with an indicating coiled spring comprising: a tool body having a driving end integrally formed thereon and an annular groove defined in an outer periphery of the tool body; and an indicating coiled spring stably received in the annular groove of the tool body, the indicating coiled spring having a colored indicating mark formed thereon for easily identifying a standard of the rotary tool, the indicating coiled spring being made of metal, wherein the indicating coiled spring is hard to be broken and a lifetime of the indicating coiled spring is lengthened; wherein the indicating coiled spring is able to elastically expand to be easily and co-axially sleeved on the annular groove of the tool body, the indicating coiled spring being replaceable and re-useable; when operating, the indicating coiled spring being rotatable relative to the tool body and stably received in the annular groove for preventing the tool body from wearing.