I give this product 5 stars for the following reasons: 1) High quality. this is scored as an "impact". This means you don't have to worry about the bushing shearing off/breaking off if you use too much force. 2) Ideal for removing a stuck/rusted oxygen sensor. 3) Comes with a 1/2" square drive with a 1/4" hex adapter. it's like a giveaway. You can use this adapter with other instruments. Background of my use: It was safer to live with this tool. My 02 sensor was seized/rusted in my exhaust. I've tried everything from impregnating the sensor with a PB (penetrating liquid) blaster to heating it with a propane torch. Nothing worked. I've tried different sockets, wrenches, etc., but all of these things just rounded the corner. This thing effortlessly removed the 02 sensor. The good thing about this tool is that it grabs the 02 sensor more as you turn the crown. So there is no chance for sensor 02 to come off or loosen. I hope you find this review helpful.