I think the BIIB Stocking Stuffers Gifts for Men, 9 in 1 Multitool Pen (link here) is seriously cool! It's got so many handy functions -- a twist ballpoint pen, ruler, a screwdriver (flat & phillips) and even an LED flashlight. Plus it's made of super strong aluminum that can be used for long amounts of time. It comes with three extra ink refills too which are really convenient!
This multitool makes for a great gift idea too - like if you need something special to give your dad or grandpa on Father's Day. The packaging is really nice and it would make even just stocking stuffers look fancy af. And the customer service seems rock-solid since they offer 30 day money back guarantee and 12 month product replacement warranty which is totally sweet!