53K views · 25 reactions | No matter how competent you are working on your bike, it can still be easy to slip with an Allen key and round out a bolt head. It’s particularly easy with things like lock-on grip bolts and 4mm stem bolts - usually as you might be nipping them up with a multi-tool, which can be harder to engage. In this video Doddy shows you a few ways you can easily remove the offending bolt. | GMBN Tech | Facebook