Contains 123 pages of technical information along with charts, graphs, diagrams and chapters on HIGH SPEED STEEL DRILLS, THRUST AND HORSEPOWER COMPUTATONS FOR HSS DRILLS, TABLE OF CUTTING SPEEDS FOR HSS DRILLS, INDEXABLE INSERT DRILLS, DRILLING PROCESSES, HALF ROUND DRILLS, MICRODRILLING, TREPANNING, BTA DRILLS, TWO TUBE DRILLING SYSTEM and TROUBLE SHOOTING TWO TUBE DRILLING OPERATIONS.