Patent ID: 7070364

Claim:
A tool, comprising: a housing having an axis, an axial bore, a cutting opening on one end of the bore, a shoulder in the bore, and external threads; a cutter located in and rotatable relative to the bore of the housing, the cutter having a cutting end, a stop, a drive feature, an axial aperture extending through the cutter from the cutting end to the drive feature, and a cutting position defined by the stop abutting the shoulder in the bore of the housing to limit a protrusion of the cutting end axially beyond the cutting opening of the housing; a control nut threaded onto the threads on the housing such that rotation of the control nut relative to the housing moves the control nut axially relative to the housing, the control nut being adjustably positioned to control an exposure of the protrusion of the cutting end of the cutter beyond the cutting opening of the housing when the control end is located axially beyond the cutting opening of the housing; and a staging washer having an axial bore through which extends the housing, the staging washer being adjustably positioned to prevent rotation and, thereby, axial movement of the control nut relative to the housing upon engagement of the staging washer with the control nut.