nas you will find most buy the correct power tool tips, eds do a set and go for the hitachi one, the others are NOT as good even the bosch and im sponsored b bosch/dremel and have one of each i got given, but i have just tis morning bought a hitachi, the others are for wood screws etc and torgue settings do not suit our fine threads
get this
http://www.oople.com/forums/showthread.php?t=104385