Just picked up a pair of these for my otherwise stock 51. I had flipped a 51 with jimpy's space invaders a couple of years ago and despite hours of scouring the internet could not find a place to get my own. After buying these, I can say that they are just as fun to use. I currently use them without the tungsten weights and quite enjoy this balance, as it feels similar to the original knife with stock spacers.

They are easy to install, feel quite durable, and make fanning a lot more fun.

Great product

Really helps with a handle weight. It makes jimping so much better.

best oil ngl really lasts and works fs and def better than squid indrusties. W buy

Thank you I needed these really bad.

The extension spacers fixed every problem I had with my invar gaboon! Gives the knife the end weight it was missing, as well as a little extra length to hold on to! Adds a little aesthetic flair as well :) 10/10 would purchase them again!

Just installed my mods and it turned my Arc Angel from a mediocre flipper into a solid one. The weight and balance are improved dramatically and as always the Zippy mods add personality to any knife. If you want the Arc Angel to be anything more than a neat pocket knife then I can't recommend these mods enough.

Works really well!

Amazing customer service and really good product.

Love these spacers on my bowie ti kraken. Perfect balance with no pins and looks far better flush with the handles than the stock pins do.

Great!

Ordered a few things and they got delayed, i was in contact with Zippys and they had it all fixed in about a day. Was definitely a good experience. My bali's look awesome are much quieter and feel more balanced.

Looks are amazing on the wraith. I feel the bali is much more personal now that I've gotten the inlays and the spacers. The translucent color glows just enough when flipping to take notice was performing tricks.
The bali as a whole feels more compact with it inside. Personally I think it adds to the comfort when flipping.
As far as fit and finish. Both are fantastic. Fit is snug enough that drops on a floor won't knock this out.

Super fun flipper with bearings that feel just as smooth as bushings. Has an awesome blade design and is wicked sharp (don’t ask how I know… lol). Favorite part about it is the weight system that allows you to change the weights without taking apart the Bali at all. Very clever design. Plus it also kinda feels like you’re loading a musket lol. Awesome work by zippy.

My issues with the tottori were squishy handles and mediocre sound but the SPACERS fix both those issues and it sounds beautiful. GOOD JOB ZIPPY