No. 1 elongated needle, total length 123mm, reaming diameter 0.8-3mm No. 2 ultra-fine needle, total length 108mm, reaming diameter 0.6-1.6mm
Tip: this file is a reaming needle, not a punching needle. It can only ream, not drill!! When reaming the hole, it is necessary to turn the force vertically, not laterally, so as not to cause needle breakage.