Key Features
Centered Roll Pin Fit The tip has a rounded center section that seats in the hole of a roll pin, helping you drive the pin out cleanly without slipping off and beating up the workpiece. Hardened Through the Tool Forged chrome vanadium steel and 54 to 58 HRC hardness throughout the full length give this roll pin punch the durability needed for repeated hammer strikes. Octagon Body Grip The octagonal body is easier to hold when lining up the punch and it does not roll away across the bench when you set it down.
Overview
The Knipex Rennsteig 9R 455 721 KUS 3/32 in. x 6 in. Roll Pin Punch is a precision hand punch built for removing roll pins without damaging the pin or the surrounding part. This is a roll pin punch designed for pin removal in repair, assembly, and maintenance work. Model Number: 9R 455 721 KUS. If you work on machinery, equipment, metal parts, or detailed assemblies where a standard flat punch can slip, this size-specific punch gives you a cleaner, more controlled hit.
What matters here is the tip design. Instead of a plain end, the center of the tip has a rounded pilot that fits into the hole created by the roll pin. That keeps the punch centered as you strike it, which helps reduce walking, edge damage, and bent pins. On small pins like 3/32 in., that extra control is the difference between a quick removal and a frustrating mess.
The body is forged from hardened chrome vanadium steel and tempered to 54 to 58 HRC through the entire length, not just at the working end. That matters because repeated hammer blows do not just stress the tip. They travel through the whole tool. Full-length hardening helps the punch hold shape, resist wear, and stand up to regular shop use better than lighter-duty punches that are only hardened at the end.
Rennsteig also built this punch with practical shop details that are easy to appreciate once you use it. The octagonal body gives you a better grip when you are lining up on a small pin, and it helps keep the tool from rolling off a cart or bench. The ground and polished tip improves fit and consistency at the working end, and the core design is made to resist mushrooming at the striking head over time.
At 6 in. overall length, this punch gives you enough reach to work in tighter spots while still keeping your hand a safer distance from the hammer face. The slim 3/32 in. tip diameter makes it a good fit for smaller roll pins where accuracy matters more than brute force. It also complies with DIN 7255, which gives added confidence that the dimensions and form are made to a recognized standard.
This punch makes the most sense for mechanics, metalworking shops, equipment maintenance crews, gunsmithing-style bench work, and serious DIY users who need a proper roll pin punch instead of making do with a generic drift. If you regularly remove spring pins and want cleaner starts, better alignment, and longer service life, this is the right kind of simple tool to buy once and keep in the box for years.
At a Glance
3/32 in. Tip Diameter 6 in. Overall Length 54-58 HRC Hardness
Stay Centered on Small Roll Pins
This punch is built for one job: removing roll pins with more control than a standard punch can give you. The pilot tip helps it seat in the pin instead of skating off the edge.
- 3/32 in. tip diameter for small roll pin work
- Rounded center section helps protect the pin and surrounding material
Built to Take Repeated Hammer Strikes
Good punches fail at the head or deform at the tip. This one is hardened through the full tool and designed to resist mushrooming, which matters when it lives in a real toolbox and gets used hard.
- Chrome vanadium steel construction
- Tempered to 54 to 58 HRC throughout the length
Easier to Hold, Harder to Lose
The octagonal body is a small detail that makes everyday use better. It gives you a steadier hold while lining up on a pin and stays put when set down on a bench or cart.
- Octagonal shape for grip and anti-roll control
- Ground and polished tip for consistent contact
What’s in the Box
- (1) Roll Pin Punch
Key Specifications
| Tool Type | Roll Pin Punch |
|---|---|
| Tip Diameter | 3/32 in. |
| Overall Length | 6 in. |
| Material | Chrome Vanadium Steel |
| Hardness | 54 to 58 HRC |
| Finish | Polished Tip |
| Weight | 0.13 lbs |
| Made In | Germany |
| Standard | DIN 7255 |
| Piece Count | 1 |
Built For
Automotive Metalworking Equipment Maintenance Assembly Work Construction Woodworking DIY / Hobbyist
Pro Tip
Match the punch size to the roll pin size and let the pilot tip seat fully before you strike. On a small 3/32 in. pin, that centered start is what keeps the punch from slipping off and marking the surrounding part.
Warranty & Support
Limited lifetime warranty.
Tool Nut’s Take
Tool Nut’s Take
Small Punch, Big Difference
The Knipex Rennsteig 9R 455 721 KUS 3/32 in. x 6 in. Roll Pin Punch is the kind of dedicated hand tool that saves parts, saves time, and keeps your work looking cleaner.
- Who it’s for: Mechanics, maintenance techs, metalworking shops, and anyone who regularly removes roll pins instead of improvising with a standard punch.
- Why it stands out: The centered pilot tip, full-length hardening, and octagon body are all practical upgrades that matter when you are driving small pins.
- Worth knowing: This is a size-specific tool, so it shines when you are working with 3/32 in. roll pins. If your work varies a lot, you will want the matching sizes beside it.
Common Questions
- What is this tool used for? It is used primarily to remove roll pins.
- What makes it different from a standard punch? The tip has a rounded center section that fits into the hole of the roll pin, helping it stay centered and reducing the chance of damaging the pin.
- What is it made from? It is forged from hardened chrome vanadium steel and tempered to 54 to 58 HRC.
- Does it meet a recognized standard? Yes. It complies with DIN 7255.
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