estate sale MAC AH650K - Air Hammer / Chisel - Long Barrel from what i can see, only that one top bit is from the original kit the others were either lost or consumed, and replaced as that happened back in the day, my brother did basement repairs - patching foundation wall cracks, then waterproofing as far as i know, that was the only thing he used this tool for to the very best of my knowledge this tool hasn't been used in many years - he switched to heavy equipment - excavating and waterproofing from the exterior working condition, to the very best of my knowledge - it was stored and ready for the next job not thoroughly tested, so.... i will gladly pull out an air compressor and a face shield for any seriously interested parties - you are welcome to bust up a worn piece of sidewalk, if you like and if i should come across any other bits, they'll quickly find the purchaser