The robot uses the lift hook to hang from the center lander during autonomous and end game periods. The hook is lifted and lowered using a tension linear slide. During the season, the lift hook went through several designs, which you can see below. All versions were designed using the Easel software and made on a Carvey 3D printer. 

    In their first two competitions, the Sparks used a C hook design, but they realized it was not secure enough to consistently lower the robot in the same place. This caused programming difficulties during autonomous period.  After the second competition, the Sparks added a latch to the C hook design. When the robot is lowered, the latch opens and the robot can drive off the bracket of the center lander.  This design provided the needed stability while also remaining lightweight.