"The Black Widow 20 Ton Air Shop Press is a great tool for the home mechanic or small repair shop, allowing you to easily bend or straighten metal, loosen seized parts, replace bearings, and more. This press has a 20 ton capacity and may be connected to an air compressor or used with the manual hand pump. The ram can slide along the top of the press to adjust horizontallyand extends from 2.75"" to 10"" from its base. Two heel blocks are included for use with various work projects. The work press table may be placed at nine different height adjustments, spaced 4.75"" apart, using large pins that are inserted into holes along the sides of the press frame that the table can rest on. A pressure gauge is also included to note the amount of force being used."