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LEE 90566 ULTIMATE LOCK RINGS (3 PK)
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$12.34
List Price: $12.99
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SKU: 90566-734307905668
Overview
These lock rings are designed for reloaders who want a more secure, easier-to-adjust way to hold dies in place during press setup and operation. The split clamp design with a cross bolt is intended to provide a firm grip without relying on tiny set screws that can damage die threads. Lee also includes its O-ring system to help keep the ring from loosening in use. Sold in a 3-pack, they are a practical choice for maintaining consistent die settings across a reloading bench.
Why Hunters Choose the Lee Precision
Split Clamp
Spline drive design for easier
Cross Bolt
Only light tightening
No Tiny
Set screws to strip or
High-strength Aluminum
Splined exterior surface
Includes Lee
O-ring to help keep the
Key Features
- Split clamp spline drive design for die lock rings
- Custom extruded high-strength aluminum construction
- Splined exterior surface for secure adjustment
- Cross bolt tightens to grip dies without set screws
- Includes Lee O-ring to help prevent loosening during operation
- Three-pack of lock rings
Best Used For
- Reloaders wanting secure die setup with a split-clamp lock ring design
- Users replacing set-screw rings that can strip or mark die threads
- Handloaders who prefer simple adjustment and firm die retention in the press
- Shooters organizing dies with included shell holder storage case
Specifications
| Clamp Type | Split clamp spline drive |
|---|---|
| Exterior Surface | Splined exterior surface |
| Fastening Method | Cross bolt |
| Includes Carbide Sizing Die | Yes |
| Includes Instructions | Yes |
| Includes Load Data | Yes |
| Includes O Ring | Yes |
| Includes Powder Dipper | Yes |
| Includes Powder Through Expander Die | Yes |
| Includes Seating Die | Yes |
| Includes Shell Holder Storage Case | Yes |
| Material | High strength aluminum |
| Quantity | 3 PK |
Pros
- Split clamp spline drive design for easier die locking and adjustment
- Cross bolt applies a secure grip with only light tightening
- No tiny set screws to strip or damage die threads
- High-strength aluminum construction with splined exterior surface
- Includes Lee O-ring to help keep the ring from loosening during press operation
Considerations & Trade-offs
- Designed for Lee die systems, so compatibility should be checked if you use other brands or nonstandard setups.
- The split-clamp design adds an extra adjustment step compared with a simple lock ring.
- The included O-ring is part of the retention system, which may not appeal if you prefer a rigid, set-and-forget lock ring.
- This is a 3-pack accessory item, so it is useful for setup and replacement rather than a standalone reloading solution.
Suggested Comparisons
- Reloading press accessories
- Die lock rings
- Cartridge reloading tool storage cases
- Reloading die sets
Suggested Accessories
- Reloading press
- Shell holder
- Powder measure
- Reloading storage case
Frequently Asked Questions
What is included in the Lee 90566 Ultimate Lock Rings 3 Pack?
The product title identifies it as a 3-pack of Ultimate Lock Rings. The long description also lists: carbide sizing die, powder through expander die, seating die, powder dipper, instructions and load data, shell holder, and storage case. The source text does not clearly state how these items relate to the lock rings themselves, so that should be verified before purchase.
How do these lock rings secure to the die?
According to the description, they use a split clamp spline drive with a cross bolt that tightens onto the die. Lee also says the design includes the company’s O-ring to help keep the ring from loosening during press operation.
Do these lock rings use set screws?
No. The description specifically says they do not use tiny set screws, and notes that this avoids the stripping or thread-damage concerns associated with set screws.
What material are the lock rings made from?
The description says they are made from custom-extruded high-strength aluminum with a splined exterior surface.
Will these lock rings stay adjusted during use?
The description says the O-ring is included because a lock ring can loosen in the press during operation without that friction. It does not provide a performance guarantee, so final fit and retention should be confirmed in use.