Trifeus and Asahi Diamond, the Leading producer of high quality diamond products, Core barrels for soil investigation, mining and mineral exploration. DCJ is the official distributor of Asahi Diamond products in Singapore.

World leading producer for high quality impregnated drill bits, our bits are commonly used throughout the drilling industry to perform geotechnical, gas drainage, gas content coring, material sample coring and mineral exploration.  Available for different soil formations.