Sykes Pickavant valve grinding tool

[Tony Griffiths]

On the subject of dressing grinding wheels - you really don't need one of these by Wickman - I've always found that, for the typical, greatly abused double-ended grinder, dressing the stone with the first type below never gives a decent finish. The second item is far better - though of course, it's all by eye and while the finish is first-class, it might not be at a perfect right-angle to the side faces. Available here
[url=https://www.ebay.co.uk/itm/Diamond-Grinding-Disc-Wheel-Stone-Dresser-Welding-Tool-Dressing-Bench-Grinder/363061203558?hash=item5488225266:g:kR4AAOSw49pfITW9][/url]