Common users include HVAC, Mechanicals, Electricians, Glaziers and GC's
Electrical - drilling into cans, panels, junction boxes
General Contractor - enlarging door hardware
Glazier - shackles for curtain wall
HVAC - enlarging holes in duct
Mechanical - enlarging holes in strut
Product is designed to be used in a 1/4" Hex Shank Impact Drivers to drill holes from 1/8" to 1/2" holes in metal, wood, or plastic.