RUKO Self-Starting Step Drill Bits Specifications and Pricing

This document provides specifications and pricing for RUKO self-starting step drill bits available in High Speed Steel, Titanium Nitride-coated, and Cobalt 5 alloy variants, with detailed dimensions for fractional step sizes. It also describes the CBN-ground flute and relief angle features that enhance cutting edge sharpness and tool life, and includes listings for related drill bit sets.