This is the only oil filter wrench anybody will ever need. I’ve used one similar to the one available at Amazon since a mechanic friend suggested it to me over 20 years ago. There’s no adjustment necessary. It doesn’t slip. The tighter you turn it with a ratchet, the tighter it grips. And you don’t need to keep several sizes of socket around, unlike the previously reviewed Oil Filter Sockets. Best of all, it’s cheap and it will last practically forever.