Steel Tooth Tricone Bit IADC126/127 Introduction The Steel Tooth Tricone Bit IADC126/127 is a rotary rock drilling tool engineered for soft formations with low compressive strength and high drillability, including shale, clay, salt rock and soft limestone. Three rotating cones with milled steel teeth provide aggressive cutting action, fast penetration and efficient hole cleaning, delivering reliable drilling performance in mining, water well and exploration projects.