Review on STAUBER Lexus Key Shell Replacement/NO Locksmith Required Using Your Old Key And Chip! Car Electronics & Accessories by Mike Sevenfourgd

This doesn't fit the RX-330 if you can't modify it. If you check your wrench and don't have little wings next to the screw hole on the closed end, you'll need to change that to make it work. But the good news is that it works better than any other replacement available! Step one, drill a hole in the end of the larger key. Find a short thin screw that fits snugly in the hole, drill a hole through the end of the wrench in one side of the plastic case. Then file the other side to leave the screw head, or file the screw head. Then take the side with the hole and cover the holes in the wings and the hole with JB weld. Then set aside to dry. Make sure you weld the JB to the bolt and it will weld it into one solid piece. Fill other holes in the wings with JB weld on the other side. Wait for it to dry and put it back together. DO NOT CLOSE IT WHEN JB WELD IS WET or you will never take it apart to replace the battery! Enjoy!