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The Striker (KS3s) uses the same materials and technology as The Prime (KS3), but is a more resistant and therefore faster spring that is able to handle heavier loads without compromising on speed. Intended to be used as an alternative to the Prime, it sets the stage for training with heavier targets while maintaining incredible rebound speed. The third generation Kewlus Cobra Bag Springs (KS3) are the first of their 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, they are engineered to outperform and outlast every other type of spring. All Kewlus Springs, like all Kewlus components are modular, so switching from one to another is a breeze.

Signature Metal Technology

The 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 springs are designed with flexibility in mind. Their 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 any of the KS3 springs directly into the Base Connector. This adaptability makes the O3 or KS3 Kewlus reflex punching bags 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 various parameters differences, and I don't recommend it.

Important: Setup & Maintenance

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

Please note that the 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