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💎 Elevate your rock game—polish like a pro, no fuss, all shine!
This Rock Tumbler Grit Kit Refill offers a complete 4-stage polishing system with silicon carbide grits and a 12,000 grit aluminum oxide polish, pre-measured for 10lb tumblers. Compatible with rotary and vibratory models, it ensures a smooth, professional finish on stones. Proudly made by a USA-based veteran-owned company, it simplifies rock tumbling with consistent, high-quality materials.







| Age Range Description | 7 to 100 |
| Asin | B07FHLKRY1 |
| Best Sellers Rank | #45,251 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #36 in Tumbling Media |
| Brand Name | MJR Tumblers |
| Color | Grey |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,298) 4.5 out of 5 stars |
| Educational Objective | Team Building Skills |
| Item Weight | 1.9 pounds |
| Manufacturer | MJR Tumblers |
| Manufacturer Maximum Age Months | 100 |
| Manufacturer Minimum Age Months | 8 |
| Manufacturer Part Number | MJR10pgk |
| Material Type | Aluminum Oxide, Plastic Pellets, Silicon Carbide |
| Model Number | MJR10pgk |
| Number Of Packs | 1 |
| Operation Mode | Manual |
| Power Source | manual |
| Set Name | 10 lb |
| Size | for 10lb barrel |
| Supported Battery Types | No batteries required |
| Theme | Nature |
| Unit Count | 1 Count |
User
Good value for the quality
Top Notch. Switched from another brand and really love how it's making the rocks shine!!!
User
nice grit will buy again
feels good to support a veteran
User
good product for polishing
good product, just what i needed
User
Skipped a step
I bought this set when I first started tumbling rocks. The grit works well. My only complaint is that I got 2 bags of the step 1 grit, 1 bag of step 3 grit, and 1 bag of step 4. I didn't get any step 2 grit.
User
Passion-fueled and high quality
This grit and polish set is exceptional. You can tell it was crafted by people who genuinely care — not just about rocks, but about the process and purpose.This company emanates expertise and enthusiasm, and that shows in the results. My rocks came out more beautiful than ever and I would prefer to buy only from these rock guys. The picture is of some rocks from my apartment landscaping after the process .The instructions are detailed but easy to follow. It’s not your typical instruction manual, rather a sincere document created by the seller from the heart (their tips and tricks included!). It’s really unique and special.I’ve been using a “gimmicky” tumbler set for my HS STEM program and at home with my kids. As a teacher, is a great tool for many lessons and even many subjects.
User
Pleased
The size was standard size happy with purchase
User
Bags are not full
Only used the 60/90 so far but I got very little grit in each package. This grit does not feel as strong/sharp as what came with my tumbler, coincidentally that is about how much you get in this order, enough for about one tumble like you get with your kit.
User
This is TRUE GRIT!
This is simply some of the best quality tumbler grit I have used. If you do the first three stages properly, then the 12,000 girt polish will be perfect. All in all this is good, works well in each stage, easy to use. the only thing that might make it better would be to package it in bottles instead of bags, but honestly, that's about it.
User
Will buy again
I purchased a rock tumbler, the first time I uses it I used the grit it came with. I wasn't happy with results. So looked into different grit. I only used the shine grit ( last stage) on the rocks that had already been tumbled with a shine grit and I was surprised at the difference. I haven't used the others but I'm sure the quality is just as good.
User
received
After 11 days, I received the grit! Polishes rocks nicely!
User
arrived safe
fast delivery from the US to the UK arrived with NO leakage of grit.Was confused about the amount as said 50lbs was thinking that was the wieght of it, but after checking more I realised was for a 50lb tumbler size .So was spot on wieghing 9lb. 60z.
User
Worked as advertised
I'm new to rock tumbling, I've used a few different polishing grits and this is the best one so far. I ran this polish cycle for 7 days and am happy with the results.
User
Excellent produit
Commande arrivé en temps et en excellente condition.
Trustpilot
1 month ago
1 month ago