In 1991, HD imported the Swiss high-quality concrete sawing and demolition equipment brand “Tyrolit Hydrostress” to Hong Kong. The diamond wire sawing technology was first introduced by “Tyrolit Hydrostress” to Hong Kong in the same year and has become the popular demolition method since then. Tyrolit Hydrostress equipment has been proven in quality and performance over the past 30 years and is the leading concrete sawing equipment in Hong Kong.