I bought this from a forum member and used it on my Terrova. I just replaced the Terrova with an Ulterra and the mount doesn't fit it. It is made from 1/4" aluminum. It has a base plate with rails attached. This bolts to your boat and then has 2 rails that mount to your TM from the bottom. Those rails then slide into the rails on the base plate. It uses a pin to lock it into the open or closed position. There are two small allen head studs that prevent the motor from sliding off the base plate. Unscrew one and slide the TM off. Works great and is very solid mount. I know it fits the Terrova but not sure what other models have the same size mount.

$50

Mount with rails mounted in extended position