The steel that they are made of, is so tough, that it cuts up the screws, and I really don't know why you would ever need them. Also, I like to have the nut part stay in one place, so the screw can find it. If you install them properly, there is no need for the floating type.
See N64KR at http://KRBuilder.org - Then click on the pics See you at the 2010 - KR Gathering in Richmond, Ky - I39 There is a time for building and a time for FLYING and the time for Flying has begun. Daniel R. Heath - Lexington, SC -----Original Message----- I avoid the floating type, like the plague. Why?