metric sizes: DIN 3124/ISO 2725-1, E DIN EN 3709, ASME B 107.5 M, American sizes: ASME B 107.1, Fed. Spec. GGG-W-641, SAE AS 954-E (test loads), HPQ® high performance steel, chrome plated.
- Optimised tooth design for faster drilling and more holes per charge. - Thin wall design for optimum efficiency when cutting thin materials. - Ejection spring for easy plug removal.