I use bits for a variety of purposes: jewelry making, fine carving, repurposing small plastic bottles into miniature vases, grooving and precision molding of small parts. I also use Locator with regular small straight HSS drill bits to drill holes that are perfectly perpendicular to the surface being drilled. My Dremel tool has a handy keyless chuck that won't fit in the "locator" hole (it can't just be pushed in) without removing the sleeve between the Dremel tool body and the rotating threaded shaft, so my first use of bits and 'Locator' required some adjustments. I've since used my own router bits to enlarge that hole in the "locator" to allow a keyless chuck to fit through and this set has become one of my favorite little tools, easy to use and now ready for everyone small job a way. .