63 Speed Gear Box (Include Reverse) Model Building Blocks Set MOC-40533--415PCS

63 Speed Gear Box (Include Reverse) Model Building Blocks Set MOC-40533--415PCS Designed by TechnicBrickPower: This interesting design implements a 63 speed gear box using 6 selectors giving in effect a 2's complement 6 binary digit number. Hence the gearbox implements all gear ratios from -32: 1 to 31: 1. You could use it for a spirograph where you want to set the turntable rotation speed relative to the drawing arm.Comes with Detailed Instructions:It comes with detailed instructions and clear steps, it is quite easy to assemble the building blocks. Excellent Gift Choice: High-quality ABS plastic material, precision casting processing, the parts have no burrs and serrations, and the surface is smooth. After the building blocks being assembled, it is a good display model. It is an excellent gift for children on birthdays, Christmas, family gatherings and other holidays. Age Recommendation: 8+Warm Tips: Any question or advice, pls feel free to email us at service@enginediyshop.comMore D