The idea of a spotting drill is they have an angle slightly bigger than your drill, so 120 or 140 degree is typical.? This means the drill starts off nice and centred as opposed to what happens with something like a centre punch.
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But yeah, they¡¯re not really all that good at drilling holes.? Terrible chip clearance and all that.
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You can get 90 degree ones for countersinking screw heads, they do a better jo than a countersink drill because you can match them to the screw head diameter and recess them a bit.? You don¡¯t get that little gap that the countersink bit gives you.
