Three hole punching is now a breeze thanks to the the Master EP312 electric hole punch by Martin Yale - all it takes is just the push of a button.You can even take it with you as it can run on six AA batteries or plug into a wall outlet with the included power adapter.
Q: “What diameter hole is used on 3-hole punches for use in a 3-ring binder?”
A: While there is no true ‘industry standard’, the majority of 3-hole punches use a 5/16” diameter hole for use in standard 3-ring binders. While some manufacturers offer punches with a smaller holes like 1/4” or even 9/32”,
