"These screwdrivers are rubbish. I used 2 of the big phillips head to loosen 4 screws and the tops snapped right off the screwdriver. there was no excessive pressure used, just by hand. I Ioosened them with ease with a 49p my wife bought in a pound shop. I will be returning these straight away. Very disapointed as it was such a handy little kit to keep in the house."