Dewalt sdsmaxset sds max chisel set 4 piece dewalt sdsmaxset qz this 4 piece chisel set from dewalt is made up of high quality sds max chisels produced from toughened steel with microprocessor controlled heat treatment for a long life they are suitable for all sds max drills with roto stop and have the following sizes 25 x 270mm and 25 x 400mm flat chisels 300mm and 400mm point chisels dewalt sdsmaxset qz sds max chisel set 4 piece