
Retainers
Moeller’s True-Set™ retainers are 100% interchangeable with all competing brands and furthermore meet or exceed all global OEM automotive standards.
Moeller Precision Tool’s exclusive and innovative, true one piece construction retainer was developed using intensive market research and user input. True-Set™ retainers are the only products manufactured from a through-hardened single piece of high quality alloy tool steel. The design eliminates stacking tolerance errors, allowing better punch positioning. The integrated design provides an end to the aggravation of lost plugs, or the separation of welded backing plates. True-Set™ retainers disperse the stamping force over the entire retainer surface, protecting die shoes.
Stringent quality practices are maintained throughout the manufacturing and inspection processes using the latest technologies and best lean manufacturing practices available.
True-Set Ball Lock
True-Set Advanced
![]() | True-Set Advanced | Metric:MRH-A |
True-Set
![]() | Heavy Duty | Inch:IRH | Metric:MRH |
![]() | Light Duty | Inch:IRL | Metric:MRL |
True-Set Economy Round
![]() | Economy Round | Inch:IRR | Metric:MRR |
Mini True-Set
![]() | Mini True-Set | Metric:MRM | |
Square Type
![]() | Square Type | Heavy Duty:IRS | Light Duty:IRF |
End Type
![]() | End Type | Heavy Duty:IRE | Light Duty:IRG |
Extra Heavy Duty
![]() | Extra Heavy Duty | Inch:IRX |
True-Fit Insertable Punch Retainers
True Set Style
![]() | Catalog Pages | Inch:IRI | Metric:MRI |
![]() | Download Geometry Files STEP, IGES, DWG | Inch:IRI | Metric:MRI |
Backing Plate Style
![]() | Backing Plate Style | Inch:IRJ | Metric:MRJ |
![]() | Download Geometry Files STEP, IGES, DWG | Inch:IRJ | Metric:MRJ |

MPT's newest ball-lock innovation! True-FitTM Retainer Inserts are intended to be installed as slip-fit. Please refer to our Advanced Stamping Applications catalog pages (linked above) for hole dimensions and recommended tolerances. |
True-Set Shoulder
For Round Punches
![]() | For Round Punches | Inch:IRN | Metric:MRN |
For Shaped Punches
![]() | For Shaped Punches | Inch:IRO | Metric:MRO |
DuraPunch Retainers
For Round Punches
![]() | For Round Punches | Inch:XIRN | Metric:XMRN |
For Shaped Punches
![]() | For Shaped Punches | Inch:XIRO | Metric:XMRO |
Trumpet Head Retainers
Trumpet Head Retention Sleeve
Retention Sleeve | MetricXMAQ |
Endmill for Trumpet Head Retainer
Endmill | MetricXMAK |
Retractable
Ball-Lock
![]() | Ball-Lock | Metric:MRA |
Shoulder Style for Round Punches
![]() | Shoulder Style for Round Punches | Metric:MRC |
Shoulder Style for Shaped Punches
![]() | Shoulder Style for Shaped Punches | Metric:MRB |

Special Multi Hole Retainers
Moeller Precision Tool’s patented True-Set multi-hole retainer provides an innovative, low cost solution in building dies.
- Manufactured from a single piece of high alloy tool steel, through hardened and ground for accuracy and long life
- Unique design reduces die assembly time by eliminating backing plates and backing plugs, providing a 15-30% savings over backing plate styles.
- Available in both light and heavy duty, inch and metric sizes.
- Interchangeable with all competing brands.
- 100% customer satisfaction guaranteed.