Tungsten Carbide Tip. Finish: Sanded. Specially designed ground tungsten carbide tip. Heat treated to increase the life span of the drill bit. Hexagon shank stops slippage in the drill chuck increasing speed and efficiency. Sand blast finish for increased durability. Reduced shank to 12.7mm from size 16mm diameter upwards. Suitable for drilling stone, brick, concrete and most types of masonry. Appearance and colors are often affected by your display settings and therefore, should not be used for matching purposes.
Function: These double end center drills are traditionally used to make a conical hole for a lathe center in order to make a starting point for a standard twist drill, designed to prevent the twist drill from walking.
These center drills got quick cutting speed, and good chip removal.
Size: 5 Drill diameters:1/1.5/2.5/3.15/5mm (5 pieces),different diameters can meet your need on spotting drill bits.
Shape: Each bit has a double end and grinding at a standard 60 degree Angle.
General-purpose drill, to drill steels with tensile strength up to 1.000 N/mm2, cast steel, grey cast iron, malleable cast iron, nickel brass and graphite.
The additional split detail permits better positioning and reduced feed force and torque.
TiN coating provides longer tool life or increased cutting speeds.
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