KomeStone Rock Tumbler Grit and Polish Refill Kit (6 Pounds) — 4-Step Media for Up to 40 lbs of Rocks

If you already have a rock tumbler and want better consistency without hunting for the “right” media each time, this KomeStone Rock Tumbler Grit and Polish Refill Kit is built for that repeatable workflow. It’s a 4-step set designed to take you from rough shaping toward a final polish, with separate bottles for each stage.

Key takeaways

This refill kit focuses on making the grit/polish process simpler and more repeatable. Over the paper, the big selling point is that it’s organized as a true 4-step progression, and it’s portioned so you can measure and store grits with less mess than a bulk bag.

It also leans toward higher-volume use. The kit is stated as ideal for tumbling up to 40 lbs of rocks, which is the kind of capacity that matters if you’re doing multiple batches or a larger project and don’t want to run out mid-process.

What’s in the 4-step lineup (and what it’s for)

This kit is arranged for a coarse-to-final-polish path. It includes polishing grits in four stages: coarse, medium, pre-polish, and final polish. According to the details provided, the materials are split between Silicon Carbide (for the earlier grinds and pre-polish) and Aluminum Oxide (for the final polish step).

In practical terms, think of it like this: you use the Silicon Carbide stages to progressively refine the surface, then switch to Aluminum Oxide for the finishing step. That structure is usually where beginners get frustrated—mixing steps or using the wrong material for the finish—so having it bundled as a sequence helps keep your process organized.

The “refill kit” angle: less hassle between batches

Refill kits live and die by convenience. This one comes with two spoons and individual packaging for each grit, which is a small detail that can save time when you’re setting up a new batch. Instead of measuring from a generic pile, you can portion from the provided setup and keep each grit stored separately.

There’s a minor limitation, though: it’s a refill kit, not a complete tumbler starter package. If you don’t already own a compatible tumbler, you’ll still need the equipment. Also, while it’s labeled as compatible with any rock polisher, you’ll want to match it to your tumbler’s workflow (especially if your routine uses slightly different step durations).

Capacity and compatibility: why it matters for buying decisions

The kit is described as suitable for up to 40 lbs of rocks. That gives you a practical yardstick when planning bigger runs—if you commonly tumble enough material to feel “busy,” this size is more likely to stay ahead of your demand.

On compatibility, the kit states it works with any rock tumbler. That’s helpful if you’re not tied to one brand or if you’ve upgraded your setup over time.

Still, don’t ignore fit-of-process: tumbling results depend on more than grit alone (like how you load the barrel and how you follow each step). This media set can be a strong base, but it’s not a guarantee of polish if your overall tumbling routine is inconsistent.

Tech specs

• Type: Rock tumbler grit and polish refill kit (4-step tumbling media)
• Total grit amount: 6 pounds
• Intended volume: Ideal for tumbling up to 40 lbs of rocks
• Coarse grind: 2 lbs Silicon Carbide (coarse)
• Medium grind: 2 lbs Silicon Carbide (medium)
• Pre-polish: 1.5 lbs Silicon Carbide (pre-polish)
• Final polish: 1.5 lbs Aluminum Oxide (final polish)
• Includes: 4 bottles, two spoons, individual packaging for each grit
• Compatibility: Compatible with any rock polisher/tumbler