Classic (KS2) Core Kit (No Base)
Classic (KS2) Core Kit (No Base)
All duties and tariffs pre-paid. No extra charges at delivery.
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The Classic (KS2) Core Kit provides the controlled, responsive rebound of the KS2 Classic Spring in an affordable no-base setup designed for use with a solid DIY base. It is an excellent starting point for anyone new to reflex-bag training, while still giving you the flexibility to upgrade individual components as your training progresses.
Who This Kit Is For
This kit is ideal for anyone who wants a quality cobra bag at the lowest possible starting price and is comfortable making their own base. The included Base Connector can be mounted onto a layered timber-board base or permanently secured to a suitable solid floor, such as a wooden deck.
Please note: This Core Kit does not include a freestanding base, Platform Paddles or sandbags.
Make Your Own Solid DIY Base
The recommended setup is a solid DIY base made by gluing multiple layers of MDF board or particle board together, then securely mounting the Base Connector onto the top. This creates an extremely sturdy and affordable base that can be customised to suit your preferred height.
You can also attach castor wheels to the back of your DIY base, making it much easier to move the cobra bag when needed. Follow my step-by-step DIY base guide for the recommended materials, videos and latest design improvements.
What’s Included
- Classic (KS2) Spring : Second-generation Kewlus spring designed to provide a controlled and responsive rebound. It fits onto the Click Bar and is also compatible with standard ¾-inch pipes for DIY setups.
- 2 × Classic Spring End Covers: Rubber covers that screw onto the ends of the KS2 Spring, allowing the Polymer Red Bar and Aluminium Click Bar to click securely into place.
- Classic Target Ball: Lightweight synthetic target ball designed to complement the controlled rebound of the KS2 Spring.
- Target Ball Adapter : Extendable adapter designed to hold the target ball securely while allowing you to adjust the reach of the cobra bag.
- Polymer Red Bar : Lightweight top bar designed to increase the speed and intensity of the rebound.
- Aluminium Click Bar : Lightweight, rust-free bar used below the spring for overall height adjustment.
- Alloy Mast : Lightweight, rust-free aluminium mast designed for general home training use.
- Base Connector : Rigid composite-fibre connector designed to secure the mast firmly to your DIY base. Includes the stainless-steel collar clamp used to lock the mast into place.
DIY Base, Height & Upgrade Tips
For the best stability, make a DIY base that is at least 3 inches thick. Use mounting screws or bolts that are appropriate for the thickness and construction of your base.
Ideally, the top of the target ball should sit at around chin height when you are standing upright in front of the bag. The mast and Click Bar allow you to adjust the overall height. Taller users can also glue additional layers onto the DIY base to add extra height.
A taller base also allows you to use a shorter top section while maintaining a comfortable target height. This can improve the speed and responsiveness of the rebound.
The Classic (KS2) Core Kit is part of the fully modular Kewlus system. As your timing, accuracy and coordination improve, you can upgrade individual components rather than replacing the entire cobra bag.
For a faster and more demanding rebound, you can upgrade to the Prime (KS3) Spring . For a premium no-base setup, consider the Prime (KS3) Core Kit . For maximum rigidity and additional height, consider the O3 Kit with its OctaBase.
Because this Core Kit does not rely on a large moulded plastic base, it also offers a more sustainable long-term setup. Every major Kewlus component can be replaced individually if it eventually wears out, so your cobra bag can continue evolving with your training rather than being discarded and replaced.
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Shipping & Delivery
Shipping & Delivery
Shipping is calculated at checkout based on total weight and price, with some periodic discounts. Currently there is free shipping on orders over $200 USD.
USA & Canada
Orders for the United States and Canada are typically shipped from our North American warehouse in Canada, with most deliveries arriving within 2–5 business days.
If an item is temporarily out of stock in North America, it may be shipped directly from our international warehouse. In that case delivery usually takes around 1–2 weeks, depending on location.
Please note that an adult signature is required for delivery of cobra bag kits. The courier will NOT be able to leave the package unattended.
International Orders
Orders outside the USA and Canada are shipped from our international warehouse and typically arrive within 1–2 weeks, depending on destination.
All duties and taxes are pre-paid, so there are no additional fees upon delivery.
Multiple Shipments
Because we operate multiple warehouses to keep delivery times fast, some orders may arrive in separate packages if items ship from different locations.
Tracking
You will receive an email with a tracking link as soon as your order is shipped. Orders are not shipped on weekends or public holidays.
Pre-Ordering Products
Some products may be available for pre-order. If you place an order containing both in-stock and pre-order items, the entire order will ship once all items are available.
Reedy has created a very impressive, yet simple cobra bag (at a decent price). I ordered the PVC pipe kit and found it to be incredibly fast! I'm really enjoying it so far. Leather bag itself feels great and all the parts seem well made. Everything just clicks in, like Reedy says it does. Love it so much I ordered the spring to be able to switch between the spring and the PVC bag(s). Great product(s).
At one point, I had to email Reedy with a question and he quickly responded. Customer service, also five stars!
Overall I’m extremely satisfied with the quality of construction. Everything is built to withstand a beating EXCEPT the tiny screws that hold the multi base to the wood board. A hard punch ripped the tiny screws out of the wood. My solution was to drill the holes of the multi base to be wider, and install bolts through the board and multi base to ensure it will never come loose again. And with this, it’s actually able to be uninstalled from the wood board for even tighter storage/transport if desired.
Otherwise it feels amazing and I’m definitely getting my warm ups in before kickboxing classes.
Thank you for the review and the feedback! Awesome - you did the right thing to use larger screws/bolts. The screws that I included are really meant for the Platform Paddles which plug into the Multi Base and only require minimum tightening. If using with a custom baseboard then I totally recommend getting thicker and possibly longer screws (or even bolts) to match the thickness of your baseboard and base combined.
Classic (KS2) Core Kit
Ottimi materiali reattività ai colpi semplice da montare !! Sono felicissimo!!! Ti arriva tutto a casa semplice semplice... Reedy sei il numero 1 grazie
I've owned the KEWLUS cobra bag for about 6 months now. It's actually a great product for the price. I would say other comparable products will run you about $100-200 more.
The Good:
+ The various levels of height adjustment are great
+ All the parts fit together nicely and nothing feels loose
+ The spring action is on point and strong!
Then Bad:
- The one plastic part (the bag adapter) has broken all the way around the cone, within about 6 months. It's not a huge cost to replace, but is an annoyance to refit. For reference, I'm 5' 8", weigh 126 lbs, and I'm not slugging the cobra bag. I use it mostly for coordinating defense-to-offense drills for improving my philly shell. I don't know if I got a faulty piece or if it's just not made to last, but I expected it to last at least a year given my stature and approach to training with it.
- Unless you have a painted cement floor, the suction base probably won't work for you. I have a very flat and clean "Driftwood laminate floor" and it will not stick for anything. I've tried wetting it, weighting it, heating it, nothing works. I ended up bolting it into a large spare cutting board and weighing that down, which works perfectly.
Overall it's a great product and still worth buying for the quality vs. cost compared to other bags. If you're a DIYer this is your go-to cobra bag. Though I'd definitely recommend purchasing an extra adapter with the original order to avoid paying shipping on your very probable second adapter in the future.
Hi Mason, thank you for the review and the detailed feedback. I'm sorry about the Ball Adapter breaking on you. As a result of feedback like yours, I am releasing an upgrade for this part at the end of this month. The new Adapter will be a lot stronger and should not break.
Hits about the same as the fierce reflex bag Liked most everything about the bag except 2 things first is I wish u could make the bottom part talller without making the bag slower but making the top taller 2nd is the bag itself not sure if I didn’t tie it up properly but it almost feel like the bladder is going to come off I think this an issue on my part though beside that the bag works amazing good quality spring suction cups also work good some things that make them better are water or vitamins n e oil