Fully Ground Extra Long Spiral Drill Bit Set: 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm - 160mm To 400mm Length, Straight Shank

This premium drill bit set features fully ground, extra-long spiral bits designed for precision drilling. With diameters ranging from 3.6mm to 4mm and lengths extending from 160mm to 400mm, these bits are ideal for reaching deep into materials with ease. The straight shank ensures a secure fit in standard drill chucks, providing stability and accuracy. Perfect for professional or DIY use, this set delivers reliable performance for a variety of applications.