This model differs from the GM2 in that it has a 90 degree output shaft. This motor offers 48.61 in*oz of torque at 3V, rotating 360 degrees every 1.5 seconds (24 rpm - just a hair slower than a servo), drawing 400mA at stall (free running at 40mA).

With a 7mm double-flat output shaft (avoid using the "D" output - it's not meant to take rotational load) and a built-in clutch (limiting at 60 in*oz, but easily "locked"), and built-in mounting screw holes, this is why we like these motors!

Overall dimensions are 70.1mm long x 22.3mm x 37.7mm (2.76") x (0.878") x long (1.48") including output shafts, while only weighing 30.5grams or 1.08ounces.