Funny, those Kirschen ones caught my eye too. Butt chisels, well they're, erm, shorter... More, ah, compact, you might say. :wink: S'all about balance primarily; your hand being nearer the cutting edge and so forth. Particularly handy if you like to hold the chisel upright by the blade while you give it a tap, 'cos it's much less likely to fall over. On the other hand there's less visual reference to tell you if it's perpendicular or not. Theoretically good in confined spaces too, I imagine, but I wouldn't know and so often confined space theory doesn't have anything to do with reality. viz; probably best to avoid chiselling in confined spaces in the first place... :lol: The received wisdom is they're so called 'cos they're used for fitting butt hinges, amongst other things.
Cheers, Alf