I have been using these things since before most people have even heard of them. You have to understand what it is and how it works when and were to use it with PHYSICS! Force applied over UNIT AREA! This is a Tool! You have to have a mindset as to how to use it. You just dont HOOK IT UP TO AN EXHAUST AND EXPECT MAGIC TO HAPPEN! You have to rev up the motor to increase exhaust pressure, someone hold the cone on with pressure to keep it on under pressure and monitor the progress. If you have a closed exhaust system no Major leaks I can raise/PUSH 3 tons of weight in about 10 seconds. I don't understand how peoples ignorance do not recognize this.You have no idea the versatility and what you can use these things for but you have to use your HEAD! I had my first one over 22 years and on my second one. These things can ABSOLUTELY GET YOUR VEHICLE OUT OF TROUBLE OR SAVE A LIFE! But you have to understand how to use it! You can do more than raise a vehicle, you can PUSH, PULL, MOVE HEAVY OBJECTS, GET STUCK TIRES OUT OF MUD. These things are just limited to your imagination you just have to be smart about it. WHAT A TOOL! I would never go anywhere remote WITHOUT ONE! Out camping or off the grid I HAVE BLOWN PEOPLES MINDS getting them out of trouble with this thing and they said "I'm going to get one when I get back" I guess its true, you hand some people a hammer and all they can think of is driving a nail with it.