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The HITTO Piston Ring Compressors are specialized tools used in engine repair and rebuilding to safely compress piston rings, allowing the piston to be smoothly inserted into the cylinder bore without damaging the rings or cylinder wall.
These tools feature an adjustable band mechanism and a ratchet-style tightening system for controlled compression.
The HITTO Piston Ring Compressors share the following common features across all three models:
Function: Designed for the rapid and even insertion of pistons into the cylinder bore.
Material: Made of good quality spring steel.
Operation: Operated by a 1/4" drive key (an L-wrench is typically included for manual operation).
Compression Control: Utilizes a key-operated ratchet mechanism to provide controlled, safe, and rapid compression.
Safety/Ease of Use: Includes a quick release button for fast removal and an adjustable safety screw.
The compressors are distinguished by their Height (the length of the steel band) and their adjustable Operation Size (the diameter range they can compress).
| Model Number | Product Number | Height | Operation Size (Diameter Range) |
| HPRC-314 | HPRC-1 | 3" (3-inch) | 2-1/8" to 5" (53 mm to 125 mm) |
| HPRC-316 | HPRC-2 | 4" (4-inch) | 2-1/2" to 6" |
| HPRC-317 | HPRC-3 | 6" (6-inch) | 3-1/2" to 7" (90 mm to 175 mm) |

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