cross grinding and TiN coating) are provided by the manufacturer and describe the drill bit's condition in relation to hole quality

Clamp the black test lead to an electrical point

Further technical details and a full datasheet are available from the manufacturer:

Manufacturer number: 6231101401

HTN-PL28 — HTN Series hot air nozzle

Overhead ionizing air blower with auto cleaner Unit(s):Pcs cross grinding and TiN coating)Overhead Ionizing Air Blower KF 60AR from KESD This overhead ionizing air blower KF 60AR from KESD is specified as a professional anti static device. The core function of the device is air ionization to achieve static electricity neutralization. Product identity and technical parameters are taken from the manufacturer's product page. Key Features Model: KF 60AR. Power supply: DC24V. Automatic ion balance system specified to 0 10 V. Reversible fan