For example, the size follows the sequence T20, T22, T25, T27, T30, and so on. Specifically, each size increases in size by two fractions. Security Torx screws are used in electronic and computer equipment to prevent tampering.

Many stores also sell T8 and T20 security bits which are designed to fit in special screws.

The most popular size for general use is the T25, which is used for automotive or general household projects.įor larger projects, a T45 or T50 might be required. Torx bits come in many different sizes, including T1 to T100. Consequently, a single Torx screwdriver or bit set should contain a variety of different sizes of drivers or bits to accommodate the wide range of Torx fasteners. No matter the size, all Torx drivers or bits will fit any Torx screw or fastener. Larger Torx sizes such as T50, T60, T70 and larger can be used for industrial applications, or for large objects such as furniture. Slightly larger sizes like T30, T40 and T45 are often used to fasten automotive components. These are are used in electronics and small appliances. For example, a T20 Torx would have a head size of 6.35 mm (0.įor home use, the most common sizes of Torx screws are: T10, T15, T20, T25 and T27. The size of a Torx head is determined by a two or three digit number after the T. The standard Torx sizes are labeled with the letter ‘T’, followed by a number. Torx screws/fasteners come in a variety of sizes, ranging from very small ones used in consumer electronics, to very large ones used in industrial applications.

Security torx bits between t20 and t25