In Japan, the male sizes are often designated as DTC-20, DTC-27, DTC-40 (discontinued) and DTC-45 corresponding to a respective screw head size of 3.2mm, 4.6mm, 6.4mm and 7.7mm; with the size of the screw measured across the widest portion of the mating part of the head. The most common sizes in use for consumer electronics are DCT-20 and DTC-27.

Hi-Torque slot drives were designed by Alcoa Fastening Systems, for situations where very high torque is needed, along with the ability to repeatedly install and remove the fastener. [7] The design features curved walls, unlike the straight-walled slot drive. Unsurprisingly, this Halfords Advanced set is all but identical to the eight-piece collection we tried, but with two fewer ’drivers. The other major difference is that three of the six are Phillips rather than Pozis, although neither set features a stubby. They are colour coded, with two sets of three dots on the handles, which are the same style and equally comfortable. Machinery's Handbook (PDF) (27thed.). Industrial Press, Inc. 2004. p.1596. Archived from the original (PDF) on 8 September 2017 . Retrieved 8 September 2017.

Handle, generally wooden or plastic handles, are fixed to the screwdrivers. To save the wooden handle from being broken, an iron is fixed to the handle.#2. Shank The carpenter screwdriver is made of a round rod and a flat tip. Its handle is flat on two sides (as shown in the figure). This enables the worker to exert full force or screwdriver. #15 Bolster Screwdriver The Ultra-Lok, and Ultra-Lok II are some of these designs that use custom keyed drivers, which tend to be confined to industrial and institutional uses that are unavailable to the average layperson. Key-Rex screws are another design, and are used in such things as ballot boxes and bank vaults. [41] a b arcticpenguin (2008-12-29). "SupaDriv". Instructables.com. Archived from the original on 2012-03-24 . Retrieved 2012-03-12.

Ratchet Screwdriver: Ratcheting screwdrivers feature an internal ball-bearing mechanism that makes turning the screw simple and repetitive. You can do this without taking out the screw’s driver head. On the upper part, either there is a hole through which a wire is passed, or this end is made flat so that when this part is fixed to handle, it does not allow the shank to move separately. These are generally made of carbon steel. #3 Blade Camcar eventually became part of Textron Fastening Systems in the 1990s. In 2006 Textron Fastening Systems was sold to Platinum Equities, LLC, of Beverly Hills, California. They renamed the company Acument Global Technologies, which as of 2010 includes Avdel, Camcar, Ring Screw, and others. The Pozidriv, sometimes incorrectly spelled "Pozidrive", is an improved version of the Phillips screw drive. It is designated "Type IA" by ANSI standards. [20] and "Type Z" in ISO documents. The Pozidriv was patented by GKN Screws and Fasteners in 1962. [21] [22] It was designed to allow more torque to be applied and greater engagement than Phillips drives. As a result, the Pozidriv is less likely to cam out. [10] [23] [24] It is similar to, and compatible with, the Supadriv screw drive. [25] Tri-point Y000 Screwdriver (for Apple Watch and iPhone 7)". iFixit. Archived from the original on 16 October 2021 . Retrieved 28 February 2017.

a b c d e "screw drive systems". Sizes.com. 2010-12-30. Archived from the original on 2012-03-13 . Retrieved 2012-03-12. ISO 4754-1983(E) Cross recesses for screws" (PDF). Archived from the original (PDF) on April 30, 2023 . Retrieved October 1, 2023. The Slotted/Pozidriv is slightly different from the Slotted/Phillips (PH/S), and good use requires special screwdrivers. [ citation needed] ACR Phillips II Plus [ edit ] Digest, Reader's (2003). Family Handyman Best Projects, Tips and Tools. Reader's Digest. p.106. ISBN 978-0-7621-0455-0. Archived from the original on 2016-12-24 . Retrieved 2016-09-24.

The JIS B 1012 [29] was commonly found in Japanese made equipment, such as cameras and motorbikes. Superficially it looks like a Phillips screw with narrower and more vertical slots, to give less tendency to cam out. The bottom of the recess is flat, and the point of the driver has to be blunt. A Phillips screwdriver has the same 26.5 degree cone angle but because of the tapered slots will not seat fully, and will damage the screw if forced.Pavlis, Egon "arcticpenguin" [pseudonym]. "When a Phillips is not a Phillips Plus So Much More!". Instructables: share what you make. Instructables. Archived from the original on 2012-02-09 . Retrieved 2012-03-11. McMaster-Carr catalog (116thed.). p.3056. Archived from the original on 2019-12-14 . Retrieved 2010-05-06. Needs login The Phillips Screw Company owns the licensed product that is the Mortorq spiral drive system. The Phillips Screw Company must inspect and approve any punches, bits, and screws before they are cleared for production. Along with this "all licensees must submit samples regularly to ensure that the strict quality standards are maintained". [38] Solid modeling is used for the design of the punches, bits, and screws. Files are sent over to manufacturers containing these models so that there is no miscommunication and all the parts are the same across the board. 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. One of the greatest tool inventions ever made is the screwdriver. Screwdrivers were reportedly created in the 15th century, and as we moved into the 21st century, you could find them in almost every toolbox.

ISO 8764-1:2004(E) Assembly tools for screws and nuts — Screwdrivers for cross-recessed head screws — Part 1: Driver tips" (PDF). Archived (PDF) from the original on 2023-04-30 . Retrieved 2023-05-01. McMaster-Carr catalog (116thed.). p.2821. Archived from the original on 2019-12-14 . Retrieved 2011-09-26. Needs login

Care should be taken not to confuse the name of this pattern with the casual phrase "spline head" which usually refers to the XZN pattern. Powered Screwdriver: This screwdriver is powered by electricity or a battery. Power drills with flat or Phillip’s heads are frequently used along with multi-bit screwdrivers. Spline drives were specified for 5, 6.3, 8, 10, 12, 14, 16, and 20mm size screws. [82] Its primary advantage is its ability to resist cam out, so it is used in high-torque applications, such as tamper-proof lug nuts, cylinder head bolts, and other engine bolts. Most tamper-resistant screw configurations rely on the common unavailability of corresponding drivers to reduce the likelihood of widespread tampering. True tamper-proof - rather than merely resistant - screw drives include the breakaway head and one-way screw drives.