Drill King’s smallest DTH hammer β a compact, high-frequency DK20-class tool built on a next-generation BR2 valved platform. Engineered for low-pressure operation and small-diameter drilling from 2.75″ to 3.5″, the HABC-20 is the go-to choice for geotechnical, exploration, and pilot-hole programs where a lightweight, low-air-demand hammer is essential.