Bits for a screwdriver. Basic varieties and markings

Anyone who has ever dealt with repairing, building or even assembling furniture, and knowing what a screwdriver is, will certainly agree that a screwdriver in the household is a very useful thing. And if the amount of work is quite large - it is generally indispensable. But if you buy a screwdriver, pay attention to its model, power and reliability, then a thing like a bit is usually forgotten, considering it as a normal consumable. And in vain! Without this unpretentious looking, looking like a piece of a conventional screwdriver, anything, even modern, technology can be just a heap of scrap metal. And if you consider that the bits for the screwdriver withstand enormous loads and the incorrectly selected bit is able to turn the work with any, even the most modern, screwdriver into a real punishment, then the issue of choosing it should be treated with all seriousness.

What are the bits for the screwdriver and their marking

• Cross. There are two types - Ph and Pz. The Ph (Phillips) bits with cross-slots and the angle at the base of 55 ° are from zero (Ph0), designed for the smallest screws, to Ph3, designed to work with large screws. Bits for screwdriver Pz (Pozidrive) are an improved version of Ph. Having an angle of 50 ° at the base, they are provided with additional slots (the so-called "double cross") to increase the area of contact with the screw. Like the Ph, they have a size from 0 to 3. The Ph standard is more versatile, as it can approach other self-tapping screws.
• Hexagonal (Torx). These bits for a screwdriver, as is clear from the name, have the form of a hexagonal star and are used for twisting screws, screws or self-tapping screws with an internal hexagon. After the type of the bit, the diameter of the slot in millimeters is indicated.
• For nuts and bolts. Used for twisting hardware with an external hexagon, for example roofing screws. Also marked in millimeters.
• Asterisk (Torx hole). Applied in household appliances and cars. They have a size from 8 to 40. It should be borne in mind that these bits can be either with internal holes, or without them.
• Slotted (SL). These are the most common flat bits. Widely used for working with screws and screws. The width of the tip of the spline bits is indicated in millimeters.

In addition to the main types, there are very specific bits for screwdrivers, for example, double pin - looks like a splined, but with a slot in the middle, or tri-wing and torq-set, similar to the cross.

Bits for a screwdriver. How to choose exactly what you need?

When choosing a bit for a screwdriver, you need to check how it corresponds to the screw or self-tapping screw that you want to twist. The bit must be firmly held in its head. Otherwise, the torque will not be transmitted enough, "nasty" sounds will be heard during the operation, and as a result, the bit will be ground very quickly and become unusable. To choose it, of course, is best from well-known manufacturers. These quality bits are made of wear-resistant tool steel, designed for the greatest loads, and the use of an extension magnetic adapter allows working in any, even the most difficult places.

To solve various problems while performing repair and construction work, it is best to immediately purchase a set of bits for a screwdriver. Containing a variety of attachments, this kit allows you to work comfortably with almost any equipment.