How about removing star washers also known as push nuts or whatever they are called.
View attachment 323489View attachment 323493
Anyone have a tool to remove these, we get quite a bit of equipment with these washers fitted which makes it difficult to service.
They are usually a bit of a struggle to remove without destroying the washer and pin that they go over.
We usually use needle nose vise grips and squish them when they have a raised lip but sometimes they are very flat which makes them very difficult to get under the edge, on those ones the only way I've managed to loosen them is to use a fine sharp screwdriver and pry open one of the tangs without hopefully stabbing myself with the screwdriver.