This is a set screw lock collar. It is for a 1.0 inch shaft. They are steel and zinc coated. Perfect for keeping your shafts or bearings in place.
Shaft Collars (sometimes called lock collars) are easy to install; the collar provides an easy way to keep your shaft from sliding or your flanged bearing from coming out.
The B3 Compact charger is a very simple to use charger for 7.4 2S and 11.1 3S battery packs. No need for additional power supplies or 12v batteries as this little unit has its own built in power supply that can be powered with 100-240v.
The MiniSLAM is a programmable autonomous robot built on the Robot Operating System (ROS). It is controlled using a USB gamepad and the ROS Visualization (RViz) application.