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Kewlus PRO Spring

Regular price
$39.95 USD
Regular price
$49.95 USD
Sale price
$39.95 USD

Make the ultimate and fastest Boxing Cobra Punching Bag with the ultimate Kewlus PRO Spring: the KSR12PRO. Increase the speed to your liking, yes speed is adjustable! This spring is designed to fit easily onto a 3/4 inch pipe and simply held in place with a butterfly hose clamp. Increase the speed by moving the spring lower onto the pipe, thus reducing the number of active coils.

DIY Instructions

For complete DIY build instructions including a video using the Kewlus PRO Spring, go to https://kewlus.com/blogs/diy/how-to-make-pro-cobra-punching-bag.

Cobra Punching Bag DIY

For more detailed and fully illustrated instructions get the Fighter DIY eBook (Third Edition. The Third Edition edition includes the Kewlus Spring Cobra Bag DIY plus 3 other awesome projects.

Review & Build by CSquared Boxing

Check out one of the top boxing gear reviewers on YouTube, Carlo Rosauro to see his hands on take on the spring as well as his full build https://www.youtube.com/watch?v=55FD41ie3ns 

Kewlus PRO Spring Review by CSquared Boxing

Kewlus PRO Spring Community

Check out the Kewlus PRO Spring Community page to see how others have setup the Kewlus PRO Spring cobra punching bag!

Shipping Info

Free Shipping Worldwide for Orders Over $50

Order over $50 USD and get free shipping. All orders will be shipped as soon as stock is available. You will receive a notification when your order has been shipped that will include tracking information.

For orders under $50 shipping is calculated at checkout.

USA & Canada

US and Canadian orders will be shipped from Canada and takes just 2-3 days to most locations.

Australia & NZ

Australian orders will be shipped from Queensland and takes just 2-3 days.

The Rest of The World

All of the orders for the rest of the world are shipped from Canada and takes around 1 week to deliver.

Tracking 

You will receive an email with a tracking link as soon as your order is shipped from the warehouse. Please note that orders are not shipped on weekends or public holidays.

Pre-Ordering Products

Some products are available to pre-order and receive as soon as the are in stock. Please note that if you order these items together with other products, you whole order will not be shipped until every item in your order is available. All items in your order will be shipped together at the same time.