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This thing is a chunk of stainless — the 5mm thickness means the wrench really bites without slipping, and the 0.65mm lip keeps solid thread contact. Fits my hub perfectly and it's not going anywhere.

Swapped out my old alloy ring for this one and the wrench bites so much better thanks to that 0.65mm lip. Threads felt solid all the way down, no wobble at all on my hub.

Swapped this onto my commuter and the 5mm thickness really bites into the hub threads — feels way more solid than the thin ring I had before. The 0.65mm lip gives the wrench a nice full seat, so I'm not worried about rounding anything off.