This bit set is not cheap.  However, I would have only spent $10 extra to get them, if I had not tried to get cheaper sets first.  I find that I'm using these more and more, from shed building to jig building.  I have one of these bits in the cordless drill and a screw driver bit in the cordless impact driver.  The collars easily adjust to different screw lengths and the collar don't slip.  My first cheap version would slip without me noticing, until I drill right out the front side of the project.  That is frustrating.  But it doesn't happen any more.