One final difference: Hammer drills and standard drills use a chuck that can accept a variety of bits, but an impact driver ...
An impact driver is the workhorse in any workshop. Dealing with screws and other fasteners that require some real muscle to handle? Step aside, cordless drill, and let the impact driver take over.
Tests show the $65 Hyper Tough Hydraulic Impact Driver surprisingly rivals Milwaukee's M18 Surge in speed, though it trails ...