A little off subject...all cordless hammer drills are useless compared to a rotary hammer. I bought a rotary hammer a few years ago & haven't used a hammer drill since. I use Porter Cable corded & Panasonic cordless and have only trashed one of the Panasonics in several years. The Panasonic 1/2" 18v hammer drill disassembled in an odd situation where I was backing out of a hole & caught an edge that unassembled the chuck.
Dave
