Total number of items
The total number of items in the set. In this case, both the actual
bits and end heads are taken into account, as well as additional accessories such as an adapter, a bit holder, etc.
The more items in the set, the wider its possibilities. However, note that the specific composition of the kit may be different, so when buying it is worth specifying not only the number of items, but also their specific types.
SL bits sizes
The sizes of the SL type bits included in the set and the number of bits of each size.
For the bits themselves, see above. The size is indicated by a number indicating the width in millimetres; if the bit is more than one, after the size their number is specified. For example, the marking "SL4, SL6x2" means one bit for 4 mm and two for 6 mm.
T bits (Torx)
The total number
of Torx bits supplied in the set.
The Torx tip has the shape of a six-pointed star. This provides a larger area of contact with the fastener than flat and cross bits, and allows you to work with higher forces.
T bits sizes
Sizes of the Torx type bits included in the set and the number of bits of each size.
For the bits themselves, see above. The size in this case is indicated by a conditional number; the larger the number, the larger the slot for which the nozzle is designed. The specific size to which this or that number corresponds can be clarified according to special tables. If there is more than one bit, the number of bits is specified after the size. For example, the entry "T7, T8x2" means one bit of T7 and two of T8.
TH Bits (Torx Hole, Torx Security)
The total number
of Torx Security bits supplied in the set.
Torx Security (also Torx Tamper Resistant) is a variation of the Torx tip (see the relevant paragraph), supplemented with anti-vandal protection. On fasteners, this protection has the form of a pin in the centre of the star slot; accordingly, Torx Security lugs differ from regular Torx lugs in having a hole for a pin. At the same time, bits of this type are also suitable for conventional Torx fasteners, but not vice versa.
TH bits sizes
The sizes of the Torx Security bits included in the set and the number of bits of each size.
For the bits themselves, see above. The size in this case is indicated by a conditional number; the larger the number, the larger the slot for which the nozzle is designed. The specific size to which this or that number corresponds can be clarified according to special tables. If there is more than one bit, the number of bits is specified after the size. For example, the entry "TR7, TR8x2" means one bit of TR7 and two bits of TR8.
SQ square bits (Square, Robertson)
The total number
of square bits supplied in the set.
Square type bits, as the name suggests, have a square profile tip. The name Robertson also occurs. In general, fasteners with square slots are not common in Europe, therefore, bits for it have not received much distribution.
SQ bits sizes
The sizes of the Square bits included in the set, and the number of bits of each size.
For the bits themselves, see above. The size in this case is indicated by a conditional number; the larger the number, the larger the slot for which the nozzle is designed. If there are several bits of the same size, their number may be specified after the size, but Square type bits are usually supplied one of each size.
Bit length
The size of the bits in length characterizes the range of work. The standard value for most bits is a length of 25 mm - these are
small bits. There are, of course, other approximate values, for example 30 mm. However, the part is not always easily accessible, so the bits can be
medium in length (about 50 mm) and even
long(70 mm or more). Such a variety of sizes allows you to choose a set for the specific needs of the master.
