The green circle, passing through the six points of contact between the two components, represents the direction of the rotational force being exerted at each of those points. A smaller number corresponds to a smaller point-to-point dimension of the screw head (diameter of circle circumscribed on the cross-section of the tip of the screw driver). Security Torx has its own set of variations, and many other variations of Torx drives are available in Security or TR versions.

If you are using Torx bits then these will need to be fitted into a suitable handle holder or Torx wrench to enable you to use them. If you ever have to take apart a phone or other device you will probably come across at least one screw which won’t budge. Principles of operation [ edit ] The angle between the plane of contact between tool and fastener and the circumferentially directed force is much closer to 90° in a Torx type of head (lower) than in a conventional hex head (upper). As noted, standard 6 point Torx screwdrivers will not mate with security torx screws due to the additional centre pin in the socket head. Or if the head is a bit damaged you can try using a rubber band in-between the screwdriver and the head of the screw.Torx screwdrivers have a 6-point star shaped pattern and are also commonly known as star screwdrivers or star bits as they let you use torque to screw more than usually possible. Whereas the tendency of Phillips drivers to cam out under excessive torque has been listed as a feature preventing damage to the screw-head or driver, [5] Torx heads were designed to prevent cam-out.

Trying to get a security screw to budge with anything else could cause damage to the item, the screw, or even yourself. T3 – T10 will be enough for most people, and then you can add additional size bits as and when you need them. It actually fits much better than a Philips head screw which makes it easier to tighten screws without the risk of slipping out and causing damage.

We are all familiar with traditional slot-head screws, which require a flat-bladed screwdriver, and cross-head screws, which might be Phillips or Pozidriv.

The unusual star-shaped head makes them far more secure than regular flat-head or cross-head screws and allows higher torque transmission so screws and bolts can be tightened more securely. g. an E40 socket is too large to fit a T40 Torx bit, while an E8 Torx socket will fit a T40 Torx bit [6]). Other tool manufacturers have been producing 8-, 10- and 12-point star drivers and sockets for many decades.Although the brand "Torx" generally refers to the standard 6-star-driver or -socket, there are many variations to the original design, including a number made or licensed by Torx. The name is shortened to IP (Internal Plus) with sizes ranging from 1IP to 100IP [18] (sometimes listed as IP1 to IP100 [19]) and EP (External Plus) with sizes ranging from 1EP to 42EP as well as smaller sizes ranging from H7EP to H2EP and includes five-lobed tamper-resistant variants. One of the most common types of Torx is the T8 which is generally used on consumer electronics and computers. If this radial force component is too great for the material to withstand, it will cause the corners to be rounded off one or both components or will split the sides of the female part. Torx screwdrivers have distinctive 6-point star shaped head which mate perfectly with appropriately sized screw heads.