Kewlus Prime (KS3)

The third generation Kewlus Cobra Bag Spring (KS3), which I have named "Prime", is the first of it's kind in the world to be made from a specially formulated metal. Now tested and proven to perform and last for years in numerous boxing gyms around the globe, it is engineered to outperform and outlast every other type of spring. Due to the proven performance and reliability over the last two years it is the spring that comes with all of the KS3 and O3 kits.

Signature Metal Technology

All KS3 springs are engineered from a unique formula metal that achieves the perfect balance between flexibility and springiness. This proprietary alloy delivers exceptional rebound performance and extreme longevity, ensuring consistent, high-quality training every time. Moreover, its remarkable adaptability allows you to easily adjust the spring -whether by bending or straightening (fully assembled) to achieve your desired angle or to correct any slight deviation. This means that even if the spring develops a minor bend over time, you can restore it to perfect alignment, maintaining peak performance under all conditions.

Versatile Configuration Options

The KS3 is designed with flexibility in mind. Its innovative connectors not only allow you to make minor height adjustments at either end, but also convert the cobra bag into a shorter version by plugging it directly into the Base Connector. This adaptability makes the Kewlus accessible for young athletes as early as age five. Additionally, you can mount the short version upside-down to create the ultimate slip bag or install it horizontally on a wall - ideal for practicing uppercuts and hooks. These dynamic configuration options empower you to tailor your training environment to meet diverse needs and skill levels.

Please note that trying to adapt the Kewlus Spring to another cobra bag of a different brand is unlikely to work due to important parameters such as the spring connector diameter, as well as the length and weight of the top section of the bag. Heavy top section bags will result in slow performance.

Important: Setup & Maintenance

Before using the KS3 Spring, please read the KS3 Spring Maintenance Guide.

Please note that the red connectors at the ends of the spring are screwed in and secured with a type of adhesive seal. If for any reason the adhesive seal is broken, please apply epoxy glue to the thread of the connector and screw it back in, leaving in for 24 hours to seal. Here's a link to the type of clear epoxy glue that is suitable for this: https://amzn.to/3B2tGVu