D124 - Panel Drills Single Ended Blue Bullet Sutton Tools Blue Bullet panel drills have been developed to drill holes for rivets in flat and curved panels and used in sheet metal fabrication. The blue finish reduces chip build up on the cutting edge and is a better choice when drilling ferrous materials. 135 self-centring point minimises wandering when starting and ideal for thin materials Flute length designed for shallow hole drilling no deeper than 1.25mm x diameter Made from M2 High Speed Steel (HSS) offering the best combination of strength, heat & wear resistance Blue surface finish for ferrous applications. The steam oxide finish prevents chip build-up on the cutting edges and reduces cutting friction, especially in low carbon steels Diameter #20 Length 54mm Flute Length 19mm Shank 4.09mm