LEXIVON XZN Triple Square Spline Bit Socket Set, Size M4 M5 M6 M8 M10 M12 M14 M16 M18 | Allen Key Socket Multiple Teeth 10 Pcs Set, for Torque Wrench, Ratchet Wrench, Impact Power Drills (LX-145)

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Due to the difficulty of turning these fasteners without specialized (and uncommon) five-point wrenches such as hydrant wrenches, they are commonly used for tamper resistance by public utilities on water meter covers, natural gas valves, electrical cabinets, and fire hydrants. A combined slotted and Torx drive screw was used in electronics manufacturing, and is still used by some companies.

BRITOOL TRIPLE SQUARE BIT SOCKET SET / SPLINE BITS | XZN

What size triple squares am I likely to encounter during maintenance and repair over 200K miles or so?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.

XZN Triple Square Bit Socket with 1/2 Capri Tools 30037 14mm XZN Triple Square Bit Socket with 1/2

The Frearson screw drive, also known as the Reed and Prince screw drive, and specified as ANSI Type II Cross Recess, is similar to a Phillips but the Frearson has a sharp tip and larger angle in the V shape.The hexalobular socket screw drive, often referred to by the original proprietary brand name Torx ( / ˈ t ɔːr k s/) or by the alternative generic name star drive, uses a star-shaped recess in the fastener with six rounded points.

Torx but more splines | Screwfix Community Forum Torx but more splines | Screwfix Community Forum

The radial "height" of each arris is reduced, compared to a six-point, although their number is doubled. As a makeshift if the correct spline key is not available, a spline socket screw can be turned with any screwdriver designed to drive slotted screws that fits into the socket such that the width of the blade occupies the major diameter of the socket and the thickness of the blade permits it to fit between adjacent splines. However, the security feature of this design can be bypassed by using some type of pliers if enough force is applied.

which roughly matches a classic North American 1/4" screwdriver although the North American one is often a bit thinner (~1. A cross or double-slot screw drive has two slots, oriented perpendicular to each other, in the fastener head; a slotted screwdriver is still used to drive just one of the slots. What do you guys think of this set which seems to have all three types of tools and to be reasonably complete?