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Just so, what are self centering drill bit?

Description. These bits simplify the task of pre-drilling holes for hinges or other screw-mounted hardware by ensuring that the hole is accurately centered every time. Each bit has a hex shank that fits any 1/4" drill chuck.

what Colour are metal drill bits? The black or blue-gray color on metal boring bits comes from a coating or black oxide or titanium carbo-nitride, designed to reduce friction and extend bit life. Some metal-boring bits are gold -- which is the color of a protective coating of titanium nitride.

Besides, what is a VIX bit?

These highly accurate, self-centering hinge drilling Vix bits are used for precise drilling of holes for cabinet and door hinges, door butts and all large and small hardware. Desired depth is achieved by loosening a setscrew, setting the high speed drill bit, and then tightening the setscrew.

How do you drill a hole in the center of a rod?

Start with a block of softwood scrap, like the piece of 2x4 in the photo, clamped to the table of a drill press. Then drill a hole of the same diameter as the rod through the wood block; 3/8" diameter in this example. Remove the drill bit and insert the rod into the hole you just drilled. It should be a snug fit.