Concealed hinge jig

As many of the complementary tools used in woodworking, it uses an electric hand-drill for its operation, making a Forstner bit to turn.

To create the pit hole, the jig must be fixed in place by means of the provided clamp, spin the Forstner bit by applying an electric hand-drill to its axle.

[5] A very common approach is to have a simple cardboard or aluminium template with marks for the distances to the door edges; these type of jigs are normally used with a hand drill fixed to a pedestal, for stability.

The manual method does not require a jig but it's easier to drill the pit hole using one[3] Concealed hinges are set for furniture doors (with or without a self-closing feature, and with or without damping systems).

[8] The bit includes a center point which guides it throughout the cut (and incidentally spoils the otherwise flat bottom of the hole).

The cylindrical cutter around the perimeter shears the wood fibers at the edge of the bore, and also helps guide the bit into the material more precisely.