I ordered this for my Wacom Pro Pen 3 and found a way to make it fit, but not perfectly. this worked, and i liked the grip, but i needed a grip specifically for this very slim pen, which ideally would fit better than what i managed. i contacted Korelax to talk about this, and luckily i had the chance to test a slim model, which completely solved my problem and was also actually a significant improvement over anything i've used in the past (including other korelax grips). this experience and the grip far exceeded my expectations.

Inserts are N/A. Honestly, I only bought the signature set so l could get two Blueberries with free shipping.
What I will say is that it's a good product. Normal Yonex grip tape is harder to apply evenly, adds a lot more thickness to the pen, and needs to be replaced regularly.
A Blueberry adds very little thickness and mostly just gives you better grip while being pretty easy to apply.
There is really only one downside, and it's more of a tradeoff than a con. Normal grip tape absorbs sweat, while Korelax grips don't. During longer sessions, your pen can definitely get a bit damp. That said, it's not that big of an issue because you're trading that sweat absorption for a product that lasts much longer and doesn't need to be replaced every so often like dirty, smelly tennis grip tape.

Arrived in amazing time to Canada. The material is really grippy, as someone who's thumb likes to slowly slide when doing jumps in osu this really helped. In addition, all the custom inserts really help hone down your own grip preferences and allows you to find that perfect match of grip and performance. 10/10

Literally perfect.

I'm using it with a pen from xp-pen g640 and, honestly, works like a miracle, absolutely worth trying o.O
great and easy-to-use product.

Great customer service, great shipping. Unfortunately the Korelax Clutch doesnt match the way I grip my pen so I cut off the tail. Before, my pen used to always slip on high BPM jump maps forcing me to readjust which led to missing and failing the map. Overall very satisfied!

I've gotten the Blueberry just a few days ago and it feels so great. I used it on both the 472 and the 480 pens and don't even know what you could complain about. It's easy to apply and remove and has the perfect slip resistance for me.

i purchased my grips for christmas came super fast !! and i love it so much

Perfect for what I needed. Feels amazing and no issues at all

Sensible price, does exactly what it says, very good grip

Great product. Highly reccomend over the BS tennis racket grip

Bought this as a replacement so I don't have to constantly replace my griptape due to it getting worn out especially cause my hands sweat a lot, this grip works perfectly and feels really nice to play with and even after 4 months of very actively using it, the grip continues to be as effective as when it arrived, definitely a worth it purchase in my eyes.

The only nitpick I'd have is the ridge that's on one side of the grip, if it wasn't there it would be absolutely 11/10 perfect, but it's not a deal breaker for me

My pen feels a lot better to hold now and I don’t have to readjust my grip after every spinner or fast aim section

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I expected the product to help with my grip, and it did what it was supposed to do.

Delivery time was right on time too, just that the shipping website did not mail or text me that the delivery was already made and I was at work during that time, but that's besides the point.

The package also included a QR code that shows how to attach the pen grip to your pen, which worked wonders for me because this is my first pen grip. I am using CTL-4100 and it fitted the tablet relatively fine.

I'm currently still trying to get used to having a pen grip, my aim became very shaky now because of it and I probably need more time and plays to improve it, but it does its intended purpose which was to make my grip not slip anymore.