It's not really a question of 'good' screw drivers (although the Wera ones are good quality!), just the correct ones Torx is not the same as Torx Plus (sometimes referred to as IP) http://nicbedford.co.uk/files/torx_vs_torxplus.jpg Torx has a more rounded shape on the star pendents, which is why they slip and cause stripped heads in the Torx Plus screws used in the N9