A class of precision screwdrivers, these are generally drives built to get the job done with little screws, for example People you find in eyeglasses or pocket watches. Generally, jeweler’s sets are a mix of slotted and Phillips dimensions. A square drive screw head is actually a specialist anti-tamper screw https://typesofroofmaterial79023.thezenweb.com/the-fact-about-lead-screw-examples-that-no-one-is-suggesting-67175359