The arbor, in at least one embodiment, further comprises a pilot bit mechanism for engaging and releasing a quick change or standard pilot bit.

The pilot drill (1) and the first step drill (2) form a drill set.

The eccentric stabilizer is mounted on a bi-center (202) which has a eccentric reamer (208) section and a pilot bit (206).

A pilot drill (96) is fixedly attached to the cutting end for initiating contact with the solid body.

The apparatus includes a cutter head which can include a locating or pilot drill which is arranged so as to allow location of the cutter head but not prior penetration of the sheet material.

A left-hand threaded mandrel (51) is received within the threaded collar (63) and includes a pilot drill (56) and intermediate outwardly extending flange (60).

In 2002, the CrazyLine expands by another product, the pilot drill CrazyDrill Pilot, a perfect extension of the already existing families.

CrazyDrill Cool SST-Inox for stainless steel boasts now a revolutionary cooling system as well as the complementary pilot drill CrazyDrill Coolpilot.

The pilot tool unit comprises a pilot tool (20) that projects from the front end of the core drill (4) and serves as a centering aid for the core drill (4).

The arbor, in at least one embodiment, further comprises a pilot bit mechanism for engaging and releasing a quick change or standard pilot bit.

The pilot drill (1) and the first step drill (2) form a drill set.

The pilot tool (20) may be inserted into a predrilled pilot hole whereby to keep the core drill (4) centered on a desired location.

The eccentric stabilizer is mounted on a bi-center (202) which has a eccentric reamer (208) section and a pilot bit (206).

A pilot drill (96) is fixedly attached to the cutting end for initiating contact with the solid body.

The apparatus includes a cutter head which can include a locating or pilot drill which is arranged so as to allow location of the cutter head but not prior penetration of the sheet material.