Torx screwdrivers are particularly popular because to its 6-point star shaped design and are also known as star screwdrivers or star bits since they allow you to screw more than is normally feasible using torque. These drivers are used to drive screws that are too small to be driven by standard drill bits.
There are two types of torx screwdrivers: straight-tipped and flat-tipped.
Straight-tipped torx screwdrivers have a long shaft with a sharp point on one end and a flat head on the other. They are best used for driving shallow-diameter screws into hard surfaces. Flat-tipped torx screwdrivers have a short shaft with a flat head attached to it. They are useful for driving thick-walled screws or screws in soft materials such as wood or plastic. The tip of the tool is flat so it will slide over the head of the screw without scratching it.
Torx screwdrivers are available in sizes from 1/8 inch to 4 inches. Larger sizes are usually used for heavy-duty applications where smaller sizes are not strong enough.
Screws containing torx heads are commonly referred to as torx screws. Torx drivers are also available in straight, slotted, and crescent shapes.
Torx or Phillips screwdriver? These screwdrivers, known variously as star-head screwdrivers, pointed screwdrivers, six-point screwdrivers, and Torx screwdrivers, are all of the same sort. Torx is a trademark for a screw head with a six-point star-shaped protrusion, therefore the general moniker "star screwdriver."
These screwdrivers are used to drive star-headed screws, which are commonly found in light fixtures and appliance drawer slides. The Philips head is slightly larger than a Phillips head screw, so it will fit into a corresponding hole in a project box or drawer bottom. The star-shape of the Torx head allows it to match the shape of the recess in which it is placed, so it can be moved easily from one hole to another.
The handle of the tool is either flat or curved. The flat-handled screwdriver has advantages when working on a smooth surface, but cannot be used if there are any obstructions between its end and the workpiece. The curved-handled screwdriver is better for such situations because you can put some material underneath it to lift it up out of the way. It is important not to let these tools bend too far, since they are made of metal and any further curve may prevent them from going into a hole.
Both types of screwdriver can be used for driving regular Phillips head screws.
Torx screw heads are fashioned like a six-pointed star, and many users simply refer to them as star screws, which need star screwdrivers or star bits to install. They are most often used on appliances with several components that need to be screwed together, such as cabinets and refrigerators.
Torx screw drivers have handles that are either straight or slightly curved, with three flat faces that are aligned with the axis of the driver bit. These faces are coated with nylon or polyacetal plastic to provide traction for knurling or serrations that help control torque when driving the screws. The tip of the driver is also coated with plastic to provide some grip as it drills into the screw head during use.
Torx screw drivers are available in standard and wide-bodied designs. The standard tool has a shaft diameter of 1-1/4 inches (30 mm), while the wide-body version is 1-5/8 inches (40 mm) in diameter. The extra width provides more contact area with the screw head, which helps the driver drive fasteners without stripping them.
Each manufacturer may design its own screw drivers for use with their screws, but most use a similar concept for effectiveness. The tools can be difficult to find in stores that do not specialize in home improvement products, so they are usually purchased through online retailers.
Torx screws are most commonly found in automobiles, motorbikes, bicycles, computer systems, hard disk drives, and consumer electronics. Because of the distinctive star-shaped head, they are significantly more secure than standard flat-head or cross-head screws and allow for more torque transmission, allowing screws and bolts to be tightened more firmly. They are also less likely to come loose over time.
Star-head screws can be divided into two categories: self-tapping and non-self-tapping. Self-tapping screws need not be pre-drilled before being inserted into a material; instead, their sharp points pierce the surface of the material as they are driven in. Non-self-tapping screws require drilling before use.
Star-head screws are used primarily for joining materials together, such as wood, metal, and plastic. They can also be used for assembling parts within larger products that require multiple fasteners, such as computers. Because they go through both pieces of material when driving them in, they are effective at preventing screw loosening caused by vibration or other mechanical movement.
Star-head screws have several advantages over other types of screws including better security against loosening due to vibration, easier removal if needed, and no need to predrill holes.
Disadvantages include the cost of the screwdriver bit set required to drive them in well-done surfaces and the fact that they cannot be used with concrete or stone.