Juscycling12-Speed Front Direct Mount Chainring Lock Ring Removal and Installation Tool, Compatible with Shimano M7100 M8100 M9100 M9120 Crankset

Needed tool for 12 speed shimano chainring installation on SLX 12 crankset. Much cheaper than Park Lool and no problem with install.

Great functional tool for the job. I purchased this to change my existing chain ring to an oval. Works as needed!

I've already installed a hand full of rotors and 3 bottom brackets (fully torqued multiple times as I figured out spacers and chain lines), and its still working. It has become a bit loose on the drive side though, so it fell off a couple times on the final torque of my last bottom bracket. For a budget, this is perfect for occasional use.

The aluminum makes the adapter strong for my crankset, works very well

Worked perfectly for removing the lock ring on my Shimano SLX crank. Way cheaper than Park or Shimano version and just as good for the home mechanic.

Super

I had the Park Tool version in my cart and was ready to buy it. Then I saw this one for about half the price, so I swapped it in. I'm sure the Park tool would have done a great job, just as this one did. For a tool that is going to see very little use--I mean, how many times are you going to loosen and tighten that one lockring inside a current Shimano mtn. bike crank?--ya may as well save a few bucks.

The design of this tool is much more thought out than the more expensive park version. By allowing the use of the BB tool and the O-rings, the tool is much more secure when in use. The only problem and the reason for 4 stars is the machining for the area is off. It ended only being off by very little and I was able to force the BB tool into place. This did cause some minor gouging and scratches. I was concerned that this may be carried over to the machining for the lock ring area too so I removed my cranks just to check. This part fit just fine and the tool worked great.