Gear Ratio - 11.6: 1 / 29.8: 1 / 76.5: 1 / 196.7: 1 / 505.9: 1 / 1300.9: 16 types of gear ratios can be selected and installed vertically horizontally. A clutch gear that prevents spilling of teeth is also incorporated, and three types of crank arms are also set. A wide range of movement can be enjoyed. RE-260 type motor included. Output shaft: 4 mm diameter with screw