You probably already have one of these but if not you'll need one to remove the starter. Dodge used special high strength bolts to attach the starter to the engine and they have 10mm, 12pt heads. You can use a socket on the two upper bolts but the lower bolt needs a wrench. The bolts are tight and there's not much room to work. I have found the best way is to put the wrench on the bolt then use a piece of wood and a small jack to lift up on the end of the wrench to break the bolt loose.
Material:45# carbon steel,40CR,40CR-V
Surface Finish:satin finish,matte finish
Size:10mm
Hardness:HRC38-45
actual item may differ from picture.