Surgical tool with sheath

A surgical tool kit comprising:

• a main unit including:
• an inner tube having a first end and a second end, the inner tube including a cutting surface at the first end and a flexible portion located between the first end and the second end;
• and
• an outer tube having a first end and a second end, the outer tube including a cutting window at the first end and a flexible portion located between the first end and the second end, the inner tube received within the outer tube so as to align the cutting surface of the inner tube with the cutting window of the outer tube;
• a first rigid sheath having a first end and a second end, the first rigid sheath being removably attachable directly to the outer tube such that the cutting window extends through an opening located at the first end of the first rigid sheath and such that the cutting window protrudes beyond the first end of the first rigid sheath;
• a connector including:
• a first connector portion located on the outer tube adjacent to the second end of the outer tube such that the flexible portion of the outer tube is located between the first connector portion and the first end of the outer tube;
• and
• a second connector portion located on the first rigid sheath adjacent to the second end of the first rigid sheath, the first connector portion when connected to the second connector portion detachably couples the first rigid sheath to the outer tube, wherein
• the main unit can be completely removed from the first rigid sheath when the first and second connector portions are uncoupled from each other,
• the first and second connector portions are adjustably connectable to each other such that an orientation of the cutting window relative to a longitudinal axis of the first rigid sheath can be radially adjusted, and
• one of the first and second connector portions includes a plurality of individually selectable engagement members, and the other of the first and second connector portions includes an engaging member that is selectively engaged with one of the engagement members to select a desired radial orientation of the cutting window;
• and
• at least one additional rigid sheath having a first end and a second end, the at least one additional rigid sheath being removably attachable directly to the outer tube instead of the first rigid sheath such that the cutting window extends through an opening located at the first end of the at least one additional rigid sheath and such that the cutting window protrudes beyond the first end of the at least one additional rigid sheath,
• wherein the at least one additional rigid sheath has a shape that is different from a shape of the first rigid sheath.