with building the deck - used this drill bit with a cheap SDS port cargo drill bit to drill 17 holes for threaded rod inserts - worked great - no problems with the chisel and it looks pretty good just like when I started drilling. I almost broke my wrist when the drill got caught on a rebar in one of the supports so it grabbed first rather than cut through, but eventually cut through the rebar - the key is to let the weight of the drill do its job and peck at an obstacle. Great product, cheapโฆ