For the price this tool is really well ... It has to rest for occasional use because the tightening of the tip is a little light and do not have a screw a little to loosen seized That said ... view the size range we are talking about it will quickly screw up the screw head and the problem is quite different. Also note that the 6 bits do not all fit in the body of the driver, so you must leave a tip mounted permanently with the risk of a fall nabîme definitely tip.