5.2mm High Speed Steel Twist Drill Bit with Hex Shank 104mm Length | eBay
CoCud Tap and Drill Bit Set, M6 x 0.75 Tap Thread 5.2mm Drill Diameter, Metric Machine Screw Tap & Twist Drill Bit Tool Kit - (Applications: for Threading Tapping Repairing), 1-Set - Amazon.com
5.2mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 2pcs with Straight