Things that you MUST have:
1- Penetrating Oil
2- Work Gloves
3- Cold Chisel
4- Open-ended Wrench Or Socket
5- Propane Torch
6- Rubber Or Wood Mallet
Follow this procedure to better result:
- Heat the connection with a propane torch if you can do so without any risk of damage or fire. It helps draw penetrating oil into the threads
- Apply a liberal amount of penetrating oil in and around the joint, then wait ... and wait ... and wait. It can take anywhere from 10 minutes to several hours to loosen the joint.
- Strike the head of the bolt or nut with a cold chisel to shock the connection.
- Apply an open-ended wrench or socket of the proper size, and rap its handle sharply with a rubber or wood mallet.