simon the viking
Guru
just get an angle grinder. You,ll find it more useful than you now think, once you have it. A professional model Bosch blue / makita or hitachi is only £50 in 4.5 inch size so hardly worth thinking about a cheaply. As well as grinding or cutting stone or steel, also useful for very rough but fast sanding / shaping and the wire brushy thing is also handy for (fierce) rust and paint removal. It’ll grind the heads of your bolts in seconds
I could buy one from work cheap enough.... but I barely need an electric drill at home so reckon I'd never use it again... but the possibility of borrowing the one we use for sharpening things has arisen.... so maybe if it doesn't come up.....