ultramegabob
Senior Member
- Location
- Indiana
I have had good luck with them, you have to use a guide handle and learn how to center the bit in the plate as much as possible.  another trick I like to do with them once you have the drillbit in the attic or crawlspace  is to take a piece of #14 bare copper and  run it through the little hole that is in the center of the drillbit and make a small loop that I snap a fishing swivel onto which i attach my wire to.  this enables me to run the drill backwards and pull the wire back out through the hole at the same time using the flexi-bit as a fishtape, the swivel allows the flexi-bit to spin without twisting the wire.
	
		
			
		
		
	
				
			 
				
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		