When fighting a stubborn bottom bracket cup, the worst option especially if you value the skin on your knuckles is a slip prone, open end wrench. The ideal alternative is a six point connection, like the dual sided 2425. 4mm one inch opening found here on Pedro's Pro Socket Handle 2. 0. It provides the mechanical purchase necessary to safely remove bottom brackets, freewheels, and cassette lockrings. In fact, this tool is directly compatible with Pedro's 24mm snap channel bottom bracket, freewheel, and cassette sockets. The Pro Socket Handle 2. 0 is constructed from heat treated tool steel, features a cushioned grip, and has a length that'll give you the upper hand.