Some of my more cost effective purchases were snap on from ebay, but I'm currently over here where there is plenty of supply. Something small in inch pounds with a dial works for me. Obviously you won't have a problem with usage, but I asked as I've had airplane engines come in for overhaul where the owner had been doing his own maintenance. Computer types tend to leave things less than snug, where as dismantling something behind a plumber or builder would often lead to broken studs. Just my experience.