I have 1 and it works great, just use the old pads against the piston and turn, works well on my dual piston WJ calipers and no issues on my 3500, $6 was well worth it. Before that I used a big pipe wrench and a little pipe wrench to turn the big one and have used the prybar method also. Middle one looks better though and easier to use, last one looks like a caulk gun and a pita to get in place imo.