Alltrade 940387 Kit 69 Piston Ring Compressor Tool Set Piston ring compressor Kit69 Made using the highest quality standards Tested for durability Can be tightened to fit any PISTON from 2-7/8" (73mm) to 4-3/8" (111mm) in diameter Holds the rings securely until the PISTON is reinstalled Tool set for compressing piston rings fro cylinder installation Band sizes by-Inches include: 2-7/8-Inch thru 3-1/8-Inch , 3-1/8-Inch thru 3-3/8-Inch, 3-3/8-Inch thru 3-5/8-Inch, 3-5/8-Inch thru 3-7/8-Inch, 3-7/8-Inch thru 4-1/8-Inch and 4-1/8-Inch thru 4-3/8-Inch Band sizes by millimeters include: 73mm thru 79mm, 79mm thru 86mm, 86mm thru 92mm, 92mm thru 98mm, 98mm thru 105mm and 105mm thru 111mm Storage case includes usage photos Kit 69 includes 7-Piece for compressing the piston ring for cylinder installation