Kewlus Cobra Bag Springs

The spring is the engine of the Kewlus cobra bag system. Changing the spring changes the speed, range and feel of your reflex bag. All Kewlus springs use our proprietary Signature Alloy for stronger rebound, greater durability and longer service life.

Which spring should I choose?

Prime Spring
The perfect balance of speed and range. This is the most popular choice and the standard spring used in most Kewlus kits.

Striker Spring
Designed for maximum rebound speed and fast striking drills.

Reacher Spring
Provides a wider movement range, ideal for footwork and timing training.

Classic Spring
A lower-cost option and a great starting point if you're exploring the DIY cobra bag route.