This is a replacement upper wheel crank handle assembly.  These are usually used on 14" saws.  If your upper wheel adjusting knob is below the  top of the wheel shroud, it can be awkward to tension  the upper wheel.  I just put one of these on my older Delta saw and tensioning takes seconds now, without pinching and wearing out my wrist. You do not have to take anything off the saw to install this.  Just unwind your current adjusting knob, catch the indicator washer and nut.  Then put the new adjusting rod into the spring, add the washer and the .702 x .702  brass nut, and crank the wheel up.  The rod is 12-1/8" long uner the crank casting.  Takes less than 5 minutes.  This has been used on the Delta, Jet, and Central Machinery 14" saws.  Shipping on this item is free via USPS or UPS. I do combine shipping wherever possible. I do ship internationally. Just email me and I will quote shipping to your country.