DESC: Our SRM12 mixer is the smallest commercial grade mixer available with a #12 PTO (Power Take-Off) as standard equipment. Like all Univex Mixers, the SRM12 uses a power-efficient, variable speed transmission that enables the operator to change speeds without having to first stop the mixer. This advanced technology utilizes torque-sensing pulleys to extract a greater torque-to-horsepower ratio with fewer parts. A rugged gear train drives the beater head and PTO shafts.