HSS (high-speed steel) drill bits set is a collection of drill bits made from high-speed steel. These drill bits are designed to drill through various types of materials. Including metal, wood, and plastic.

High-speed steel is a type of steel that contains alloying elements such as tungsten, molybdenum, and cobalt. These elements help to improve the strength, hardness, and wear resistance of the steel. HSS drill bits are preferred over other types of drill bits because of their durability, heat resistance, and ability to maintain sharpness even when used at high speeds.

An HSS drill bits set typically includes various sizes of drill bits. Ranging from small diameters for drilling precise holes to larger diameters for drilling larger holes. The set may also include specialized drill bits, such as step drill bits or countersink drill bits.

The drill bits in the set are usually organized and stored in a case that keeps them organized and easy to access. Some HSS drill bits sets may also come with additional accessories. Such as a magnetic bit holder or a screwdriver bit set.

When using HSS drill bits, it is important to use the correct size and type of drill bit for the material being drilled. The drill bit should also be kept cool by using cutting fluid or periodically removing the bit from the material to allow it to cool down. Overheating the bit can cause it to dull quickly and become less effective.