Saipor 10pcs Magnetic Pentagon Head Screwdriver Bits Set 1/4 Inch Hex Shank Security Tamper Proof Pentagonal Drive Bit Five-Sided Figure Screw Driver Drill Bit for Electric Hand Screwdrivers, 50mm

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The double-square drive is two squares superimposed at 45° rotation, forming an 8-pointed star. The design is similar to a square drive (Robertson), but can be engaged at more frequent angles by the driver bit. New Bolt Drives FCA to Better Seat Assembly". www.assemblymag.com. Archived from the original on 23 August 2019 . Retrieved 23 August 2019. The Phillips Screw Company". phillips-screw.com. Archived from the original on 2021-10-08 . Retrieved 2021-10-07.

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.

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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.

Fastener Superstore Fastener Guide". Archived from the original on 2017-12-29 . Retrieved 2017-12-28. Recessed head fastener and driver combination". Google Patents. 2015-12-11. Archived from the original on 2020-01-26 . Retrieved 2017-10-13. 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. Ribe– Your development partner for fastening systems". Ribe Verbindungstechnik. Archived from the original on 2015-10-05 . Retrieved 2015-08-25. Robertson screws are commonplace in Canada, though they have been used elsewhere [14] :85–86 and have become much more common in other countries. As patents expired and awareness of their advantages spread, Robertson fasteners have become popular in woodworking and in general construction. Combinations of Robertson/Phillips/slot drives are often used in the electrical trade, particularly for device and circuit breaker terminals, as well as clamp connectors.

Ryder Windham (2006). You Know You're in Rhode Island When...: 101 Quintessential Places, People, Events, Customs, Lingo, and Eats of the Ocean State. Globe Pequot Press. pp.60ff. ISBN 978-0-7627-3940-0. The triple-square, also known as XZN, is a type of screw drive with 12 equally spaced protrusions, each ending in a 90° internal angle. The name derives from overlaying three equal squares to form such a pattern with 12 right-angled protrusions (a 12-pointed star). In other words, three Robertson squares are superimposed at a successive 30° rotation. The design is similar to that of the double-square—in both cases, the idea being that it resembles a square (Robertson) but can be engaged at more frequent angles by the driver bit. These screws can be driven with standard Robertson bits. Frauenfelder, Mark (2011-01-20). "Apple's diabolical plan to screw your iPhone". Boing Boing. Archived from the original on 2011-01-23 . Retrieved 2011-01-23.

Coin-slot drives are so-called because of the curved bottom of the recess, which facilitates driving them with a suitable coin. They are often used on items where the user is not likely to have a screwdriver when needed, such as recessed screws that attach cameras to tripod adapters, and battery compartments in some equipment such as children's toys. [ citation needed] Hi-Torque [ edit ] 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. Adler, Alexander (1998-05-18). Testing and Understanding Screwdriver Bit Wear (Master's thesis). Virginia Tech. hdl: 10919/36701. 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. Tamper Proof Nuts". Loss Prevention Fasteners. Ultra Fasteners Inc. Archived from the original on 2015-09-26 . Retrieved 2015-09-25.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. Supadrive allow a small angular offset between the screw and the screwdriver. Pozidrive have to be directly in line" 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. I just wanted to say a massive thank you for all your help yesterday. I really appreciate it and will certainly be using you again for future installation products. (Amy) ISO Fastener Standards Should Be Referenced for All Metric Fasteners" (PDF). Archived (PDF) from the original on 2021-06-26 . Retrieved 2021-10-16.