Originally Posted by
kwiksi
#55 = 1.3mm
#56 = 1.2mm
Sort of. It doesn't equate exactly, and when we're dealing with holes this small a fractionally different hole makes a big difference. Amain sells a nice kit with a pin vise and all of the sizes you'll ever need, both number drills and metric drills that go up by .05mm at a time. Highly recommended to get this kit so if you are copying setups you can copy it exactly. If I say I'm using a 4x1.2 and you use a number drill that is actually 1.17, it will behave differently. Just saying.
