Tried driver tips on two MULTI-TIP tools (standard & metric), but none fit. Looks like a very small 6-sided star w/a hole n middle. Trying again tomorrow w/mini metric set. I agree, 10 screws, two under wheels is way too much trouble for something you need quick access to often for brush cleaning. The hose has several places where it comes apart very easily. I was impressed, but this roller plate ruined it.