Patent ID: 8858133

Claim:
A pilot arrangement rotatable about an axis to form a pilot recess in a workpiece, and to engage the pilot recess to prevent the pilot arrangement skidding across the workpiece, and the arrangement having a mounting portion, a cutting portion and an arrangement operable for refraction of the cutting portion relative to the mounting portion, wherein the pilot arrangement comprises a tip which engages the workpiece to form the pilot recess, and wherein the tip comprises a tip body having a tip extremity providing first contact with a workpiece, and having a cutting formation which cuts a workpiece as the extremity penetrates the workpiece, wherein the extremity is offset from the rotation axis, wherein the tip body has a tapering portion which tapers to the tip extremity, and wherein the tapering portion has the form of a cone centered at the rotation axis and including a cutout portion bounded at a surface which is not perpendicular to the rotation axis and which intersects the rotation axis and extends to the offset tip extremity.