Tamper-resistant types [ edit ] A set of "secure" or otherwise less common screwdriver bits, including secure Torx and secure hex or "allen" variants. The middle part between the blade and the handle is called the shank. On its lower part tip or blade is made.

JIS" or ISO 8764 standardized cruciform-blade screwdrivers are available for this type of screw, and should always be used to avoid head and driver damage. Wilder, George. "What are the differences between the two types of drive– Phillips and Posidriv?" (PDF). v8register. Archived (PDF) from the original on 2016-04-09 . Retrieved 2017-09-02. The Phillips Screw Company". www.phillips-screw.com. Archived from the original on 2014-12-21 . Retrieved 2015-01-16. Transactions of Technical Conference on Metric Mechanical Fasteners. American National Standards Institute. 1975. p.67. Archived from the original on 2021-04-15 . Retrieved 2020-10-26.TORX PLUS Tamper-Resistant Drive System". www.acument.com. Archived from the original on 2019-04-18 . Retrieved 2019-04-18.

This drive type has the disadvantage of not being as precisely controlled as can be obtained by proper use of a torque wrench; applications may still fail due to either too little torque being applied to correctly fasten the joint, or too much torque being required to shear the head, resulting in damage to the material being fastened. [ citation needed] Line Head and Line Recess [ edit ] Line head driver sizes [1] InternalImprovements in or relating to screw threaded fasteners and drivers for use therewith". Google Patents. 1962-05-04. Archived from the original on 2020-01-26 . Retrieved 2017-10-13. Reed & Prince Manufacturing Corporation: Welcome". Reedandprincemfg.com. Archived from the original on 2012-04-25 . Retrieved 2012-03-12. The Supadriv (sometimes spelled incorrectly as "Supadrive") screw drive is very similar in function and appearance to Pozidriv. It is a later development by the same company. The description of the Pozidriv head applies also to Supadriv. While each has its own driver, [26] the same screwdriver heads may be used for both types without damage; for most purposes it is unnecessary to distinguish between the two drives. Pozidriv and Supadriv screws are slightly different in detail; the later Supadriv allows a small angular offset between the screw and the screwdriver, while Pozidriv has to be directly in line. [25] [27] [28] UPDATE: after finally finding a proper Y000 driver at a local electronics store I was able to complete a repair on an Apple Watch series 3. While I did have some success filing down a cheap tri-wing driver until it fit the screws, there was one screw that it wouldn't loosen. The bottom line is this:

The purpose of a screwdriver is to both insert and remove screws and nuts. If you want to replace a watch’s battery, you won’t use the same screwdriver you use to hang a shelf on a wall. The different functional screwdriver design types are described below. Adler, Alexander (1998-05-18). Testing and Understanding Screwdriver Bit Wear (Master's thesis). Virginia Tech. hdl: 10919/36701. a b Radio Material School, Naval Research Laboratory. (1943). NAVPERS 14004 Mechanical Practice. Washington, D.C.: USGPO. pp. 48, 50, 51. A thumbscrew is a type of screw drive with either a tall head and ridged or knurled sides, or a key-like flat-sided vertical head. They are intended to be tightened and loosened by hand, and are usually not found in structural applications. They are sometimes also cut for Phillips head or slotted screwdrivers, as well as having the knurling for finger grip. ASME Standard 18.6.8 covers dimensions for Type A (shoulder under the head), regular and heavy, along with Type B (without shoulder), regular and heavy. They can be found on many computer cases, and in other locations where easy access without tools is desired. The following are screw drives based on a cruciform shape; i.e., a cross shape. Other names for these types of drives are cross recessed, cross-head, cross tip, and cross-point. A double slotted screw drive is not considered cruciform because the shape is not recessed, and consists only of two superimposed simple milled slots. Some of these types are specified in ISO 4757, Cross recesses for screws.Screw head types / Product Guides / Service / Information & Services / England / Home— Wiha | Screwdrivers L-Keys Bits Pliers Online Shop| Premium Tools for Professionals". 2008-02-13. Archived from the original on 2008-02-13 . Retrieved 2012-03-12. Phillips, JIS, Pozidriv, SupaDriv and other screw drive types". blog.jtbworld.com. Archived from the original on 2014-07-01 . Retrieved 2017-09-02. When a Phillips Is Not a Phillips Plus So Much More!". Instructables. Archived from the original on 2021-06-08 . Retrieved 2021-09-23.