Unique 3/8" diameter hardened and precision ground cutting tool that makes removing spot welded body panels fast and easyHollow design cuts around weld, thus hardness does not affect tool sharpnessAn adjustable depth rod sets the tool so only the outer panel is cut through, leaving the underlying panel undamagedWhen one end becomes dull, simply unscrew the cutter from the arbor, and reassemble with the new teeth exposedWith arbor, for use in any 1/4", 3/8", or 1/2" chuck hand held drillFeatures and Benefits: Unique 3/8" diameter hardened and precision ground cutting tool that makes removing spot welded body panels fast and easy. Hollow design cuts around weld, thus hardness does not affect tool sharpness. An adjustable depth rod sets the tool so only the outer panel is cut through, leaving the underlying panel undamaged. When one end becomes dull, simply unscrew the cutter from the arbor, and reassemble with the new teeth exposed. With arbor, for use in any 1/4", 3/8", or 1/2" chuck hand held drill.