Manufacturer Warranty
Every product ships backed by its manufacturer's warranty for lasting peace of mind.
0% APR Financing
Up to 18 months 0% APR available through promotional financing at checkout.
Dedicated Support Team
Questions before or after your purchase? Our equipment specialists are here to help.
Purpose-Built Security for 1.9" Weight Posts
Lock-Jaw Axle Collars are made by Lock-Jaw specifically for 1.9" diameter bars and weight posts — sized for the job rather than adapted from an Olympic collar. On PRx's Profile Halo Arms and Leg Curl/Leg Extension weight posts, they clamp down and keep plates exactly where you put them.
Key Features
Built for specialty axle bars and weight posts, not a resized Olympic collar.
Secures plates on Profile Halo Arms and PRx Leg Curl/Leg Extension weight posts.
Quick on, quick off between sets.
Protects post and plate finish while gripping tight.
Minimal length lost on short weight posts.
Description
Weight posts on rack attachments are not Olympic sleeves — they are narrower and shorter, and a standard Olympic collar either will not fit or eats most of the loadable length. Lock-Jaw makes this collar specifically for 1.9" diameter bars and posts, including farmer's-carry handles, stubby axle bars, and log bars, so it clamps down properly instead of just wedging on.
On PRx equipment, that means the Profile Halo Arms and PRx Leg Curl/Leg Extension weight posts: this collar secures plates on those attachments where a 2" Olympic collar cannot. A larger lever and spring-loaded snap latch make it fast to fit and release, and the resin frame with elastomer pads protects both the post and the plates.
Important: this is not an Olympic barbell collar. It will not fit standard 2" bar sleeves — for those, see the Lock-Jaw Oly 2.
Technical Specifications
| Specification | Detail |
|---|---|
| Manufacturer | Lock-Jaw |
| Bore Diameter | 1.9" |
| Designed For | Profile Halo Arms, PRx Leg Curl/Leg Extension posts; also fits farmer's-carry handles, stubby axle bars, log bars |
| Locking Mechanism | Lever with spring-loaded snap latch |
| Materials | Resin frame with elastomer pads |
| Compatibility Note | Not compatible with 2" Olympic barbell sleeves |
| Available Colors | Black, Blue, Grey, Red |
Ready to Build Your Dream Gym?
Our fitness experts are here to help you design the perfect setup for your space and goals. Schedule your free consultation today and let us bring your vision to life.
Lock-Jaw Axle Collars
Vendor: PRx Performance
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Product Availability & Lead Times
Not all products are kept in stock at all times. For most products, the average lead time from the time of order to delivery is approximately 2–3 weeks. Certain products may be temporarily backordered or have longer-than-average lead times due to manufacturer availability, production schedules, or shipping delays. Lead times are estimates and may vary by product and order.
Manufacturer Warranty
Every product ships backed by its manufacturer's warranty for lasting peace of mind.
0% APR Financing
Up to 18 months 0% APR available through promotional financing at checkout.
Dedicated Support Team
Questions before or after your purchase? Our equipment specialists are here to help.
Purpose-Built Security for 1.9" Weight Posts
Lock-Jaw Axle Collars are made by Lock-Jaw specifically for 1.9" diameter bars and weight posts — sized for the job rather than adapted from an Olympic collar. On PRx's Profile Halo Arms and Leg Curl/Leg Extension weight posts, they clamp down and keep plates exactly where you put them.
Key Features
Built for specialty axle bars and weight posts, not a resized Olympic collar.
Secures plates on Profile Halo Arms and PRx Leg Curl/Leg Extension weight posts.
Quick on, quick off between sets.
Protects post and plate finish while gripping tight.
Minimal length lost on short weight posts.
Description
Weight posts on rack attachments are not Olympic sleeves — they are narrower and shorter, and a standard Olympic collar either will not fit or eats most of the loadable length. Lock-Jaw makes this collar specifically for 1.9" diameter bars and posts, including farmer's-carry handles, stubby axle bars, and log bars, so it clamps down properly instead of just wedging on.
On PRx equipment, that means the Profile Halo Arms and PRx Leg Curl/Leg Extension weight posts: this collar secures plates on those attachments where a 2" Olympic collar cannot. A larger lever and spring-loaded snap latch make it fast to fit and release, and the resin frame with elastomer pads protects both the post and the plates.
Important: this is not an Olympic barbell collar. It will not fit standard 2" bar sleeves — for those, see the Lock-Jaw Oly 2.
Technical Specifications
| Specification | Detail |
|---|---|
| Manufacturer | Lock-Jaw |
| Bore Diameter | 1.9" |
| Designed For | Profile Halo Arms, PRx Leg Curl/Leg Extension posts; also fits farmer's-carry handles, stubby axle bars, log bars |
| Locking Mechanism | Lever with spring-loaded snap latch |
| Materials | Resin frame with elastomer pads |
| Compatibility Note | Not compatible with 2" Olympic barbell sleeves |
| Available Colors | Black, Blue, Grey, Red |
Ready to Build Your Dream Gym?
Our fitness experts are here to help you design the perfect setup for your space and goals. Schedule your free consultation today and let us bring your vision to life.