This Aidelife dust cover works great. It comes with numerous O-rings to fit the shroud to the grinder. I used a Bauer angle grinder HFT 4 1/2" and found an adapter that fits perfectly. The adapter plugs into the same grommet that your surge protector is attached to. The sheath has the same clamping lever as your sheath. Comes with a wrench to tighten the lever. Excessive tightness is not required. You should not deform the shell by overtightening the nut. I didn't have to fiddle with the shroud the entire time I was using it. The vacuum nozzle had many adapters. It worked great with my old Craftsman 16 gallon shop vacuum and my smaller hard vacuum. The bristles on the bottom of the case are very hard and held up to all my abuse. I used the spacer that came with it and it still looks like the diamond grinding wheel I'm using is going too deep into the case. It still worked well and made for absolutely dust-free operation. As my grinding wheel wore out, the bristles made more contact with the ground and required more pressure to grind. The shroud has a black segment that can be flipped to the side, allowing you to sand directly onto baseboards, walls or cabinets while still providing adequate dust protection. An essential tool for indoor sanding.