The 81139 is inexpensive, portable, and very accurate. It has a simple leveling adjustment of +/-3deg. Housed in a durable, non-magnetic casing with a magnetic head that attaches firmly to rotors or spindles. ***REPLACEMENT BUBBLE VIAL #81134 ***REPALCEMENT MAGNET #81133 California Residents WARNING Product appearance and features may vary in the market as design changes, improvements and modifications are implemented.
