This is a complex composite sheet metal repair kit that repairs a common crack area on the uber expensive 210 main gear door. These doors commonly crack at the actuator attach point. Failure of the door is as horrible a thought as is locating a door originally manufactured out of un-obtainium.
We have the solution.
This kit is formed and heat treatd  to repair and strengthen a cracked or soon to be cracked area at the actuator attach point. Installation takes several hours. Instructions and tech support come with the kit. Call with questions. You are repairing a gear door that is generally un-obtainable