Countersinks

Countersinks are used to cut a cone shaped depression around the hole in order to allow a rivet or screw to set flush with the surface of the material. They are available in various angles depending on the countersunk rivets and screw heads. The cutters are interchangeable in some special stop countersinks so that holes of various countersunk angles may be made. Do not remove an excessive amount of material when using a countersink, as it reduces the strength of flush joints.

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