Piling contractors are always looking for new and cost effective methods for drilling large diameter rock sockets. Thanks to many years of development, cluster drills have become a major solution for drilling large holes over 30 inches in diameter. Today they can be seen working in large diameter foundations as well as in marine and foundation applications worldwide. Epiroc is renowned for its quality service and that is why cluster drill canisters are strictly controlled and tested. These heavy canister bodies are extremely durable and repairable, time and time again.