ak interactive drill bitsSet of ten carbide drill bits ranging from 0. 4mm up to 1. 3mm. They have a stem of the same measure to facilitate its use in any type of drill holder. They are presented in a transparent hard plastic case. Material: The bits are made from carbide or alloy steel. Compatibility: The bits can be used with the AK9006 hand drill shank or other compatible drill holders (shanks are typically sold separately). Packaging: They are presented in a transparent,