General description The Heller HSS-Co Cobalt Drill Bit 4.2mm is designed for the toughest drilling challenges in stainless steel and metal. Made from a special HSS steel with a 5% cobalt content, this drill bit offers exceptional durability and precision. Its split point and 135° point angle ensure accurate positioning and excellent dimensional accuracy. Technical specifications Material: HSS steel with 5% cobalt Drill Bit Size: 4.2mm Point Angle: 135° Concentricity: Excellent, according to DIN 1414 Dimensional Accuracy: Precision tool as per DIN 338 RN