Straight Shank Counterbore for Bolts with Hexagonal Holes CB

A type of drill for countersinking that integrates functions of drilling and fluting.
[Features]
· Hole drilling for hex socket head bolt and countersinking can be performed simultaneously.
· 4-flute HSS type.
· A straight shank.
[Applications]
· Ideal for simultaneous machining involving drilling and sinking.