I bought it to screw it to my 27 "iMac rumzu and I'm extremely happy, the quality of the bits is very good, at least for normal tightened screws. However, I do not know how that is cured when a screw was tightened times stronger, I think but before the screwdriver itself would leave the service, it is well made, but you can tell him especially at the low price. Here you can talk about more plastic than plastic. But the quality is really acceptable for the price, everything has worked out perfectly and also the storage is very convenient. I would definitely buy it again.