Just thought I would post this as possibly not all water hunters appreciate the importance of keeping their shafts and cam-locks spotlessly clean. The Garrett service tool costs in the region of $30-35, a lot more in the UK. Being a bit careful with money I made my own from an adjustable pin spanner used for removing the bottom bracket bearings on a push bike, the spanner was bought on e-bay and is Park Tool SPA-6 costing around £14 UK, all you need to do is replace the removable M5/ M4 socket head screws and fit new ones with the ends turned down on a lathe to 2.100mm diameter which fits the holes perfectly in the cam-locks, very simple and it works well, good luck and happy hunting. Rob