Craftsman 9A 1/4" plunge router. 0-2" plunge depth
No user manual.
To fasten/unfasten a router bit:
1. Lock shaft in place using Red shaft lock. This is located at the very top of the router. You need to press on it while spinning the shaft until it fully clicks into place and it says "shaft lock" on top.
2. Use the wrench to tighten/untighten the collet around the bit