Why you should apply ‘the onion’

It was a sobering experience. The grinder buzzed, sparks flew and in a few seconds the padlocks parted. A friend knocked on my door one morning. He had lost his workshop keys. He had started on one hardened steel lock with a hacksaw and after a lot of cutting had made a small groove in one of the three locks — did I have anything that would get the job done more quickly?

I fetched a battery-powered angle grinder and a metal cutting disc from my own shed. Being a law-abiding chap I had never cut a lock before and I doubted if this little 18-volt grinder would achieve much. It took less than five minutes to slice off