
I have had this kit a couple years now and so far have had every bit for scopes, lasers, eyeglasses and electronic gizmos. It's 1/8" drive but comes with a 1/4" adapter. Just a really good organized kit to keep in the range bag if you loose all those little tools that come with our optics. Apparently I'm not alone considering how many times I loan this out at the range and under $100.00.
@lowlight you might take a look at this for your classes, it even has bit for Apple phone.