Grinders
by Royal Queen Seeds
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The Metal Grinder RQS is a 2-part aluminium herb grinder from Royal Queen Seeds that delivers a consistent, fine grind without the fuss of multi-chamber setups. It's the kind of grinder you toss in your pocket, forget about, and it just works — every single time. If you've been making do with scissors, your fingers, or one of those flimsy plastic grinders that cracks after a month, this is the obvious upgrade. You can buy the Metal Grinder RQS in blue, green, or red — all featuring solid aluminium construction, diamond-shaped teeth that actually bite through dense, sticky material, and a magnetic lid that stays shut when you need it to. Each colour variant sports the embossed RQS logo on top.
We've sold thousands of 2-part grinders over the years, and the ones that come back are always the cheap plastic ones — returned because they've split, stripped, or ground themselves smooth. This Metal Grinder RQS has proper heft to it. You can feel the weight in your hand (roughly 55mm diameter, fits comfortably in a palm or jacket pocket), and the threading between the two halves is machined cleanly enough that it doesn't cross-thread or jam up after a few weeks of daily use. That's the difference aluminium makes. If you're ready to order a grinder that actually lasts, the Metal Grinder RQS is the one to get.
All three colour variants of the Metal Grinder RQS are identical in build, size, and tooth pattern — the only difference is the anodised lid colour. Pick whichever matches your rolling tray or your mood. The body on all three is the same silver aluminium finish.
| Variant | SKU | Lid Colour |
|---|---|---|
| Blue | HS0320 | Blue anodised |
| Green | HS0159 | Green anodised |
| Red | HS0310 | Red anodised |
Here are the key specs for the Metal Grinder RQS — everything you need to know before adding it to your kit.
| Spec | Value |
|---|---|
| Brand | Royal Queen Seeds |
| Material | Aluminium (anodised lid) |
| Parts | 2 (lid + base) |
| Approximate Diameter | 55 mm |
| Tooth Design | Diamond-shaped, CNC-cut |
| Closure | Magnetic lid |
| Available Colours | Blue, Green, Red |
| Logo | Embossed RQS crown on lid |
Complete your session setup: pair this Metal Grinder RQS with some RQS Hemp Rolling Papers for a smooth, even burn. Already sorted for papers? A small metal rolling tray keeps your ground herb contained and your table clean — no more chasing crumbs across the coffee table.
A quality metal grinder eliminates the uneven results and wasted material you get from tearing herbs apart by hand. You end up with chunks that don't pack well and dust that sticks to your fingers. A plastic grinder solves the first problem but creates new ones — the teeth dull fast, the threading strips, and tiny plastic shavings can end up mixed in with your herbs. We've seen it happen more times than we can count at the shop counter.
An aluminium grinder like the Metal Grinder RQS addresses those shortcomings. The diamond-shaped teeth stay sharp because aluminium doesn't deform under the kind of pressure you're putting on dried herbs. The magnetic lid means the two halves stay aligned while you twist — no wobble, no spillage. And because it's a simple 2-part design with no screen or kief catcher, there are fewer parts to clean and nothing to clog up. You grind, you open, you tip out. Done.
The honest limitation? A 2-part grinder doesn't separate kief. If you want that fine pollen collected separately, you'd need a 4-part grinder — Royal Queen Seeds makes one of those too. But for speed and simplicity, the 2-part design is what most daily users actually prefer. Less fiddling, less cleaning, more grinding.
Using the Metal Grinder RQS takes about 30 seconds from start to finish — here's the step-by-step process.
The number one mistake people make with any grinder is overpacking. Stuff the chamber full and you're just mashing herbs into a compressed disc instead of grinding them. Leave some room for the teeth to do their work. About two-thirds full is the sweet spot — you'll get a fluffier, more consistent result that rolls better and burns more evenly.
The second most common question we get: "Why does my grinder stick?" Nine times out of ten, it's resin build-up on the threading. Aluminium grinders like the Metal Grinder RQS resist it better than acrylic or zinc alloy, but they're not immune. A quick wipe of the threads with a cotton bud dipped in isopropyl alcohol every couple of weeks keeps it spinning smooth. Takes 30 seconds. Do it before the grinder seizes up, not after — because once aluminium threads lock from dried resin, you'll need pliers and patience.
One more thing we've noticed over the years: customers who buy a Metal Grinder RQS almost never come back for a replacement. The ones who buy plastic? We see them again in three months. That tells you everything about the build quality difference.
The Metal Grinder RQS outperforms plastic grinders in durability, grind consistency, and closure reliability. A plastic or acrylic grinder costs less upfront, no question. But the teeth are moulded, not machined, which means they're blunt from day one and only get worse. After 2-3 months of regular use, a plastic grinder is essentially just a container you twist hopefully. The Metal Grinder RQS has CNC-cut teeth that maintain their edge for years. The magnetic closure alone is worth the step up — no more grinders popping open in your bag and scattering herb everywhere.
Weight-wise, the aluminium adds noticeable heft. It feels like a tool, not a toy. That's not just a nice sensation — the extra mass actually helps the grinding action. You don't need to press down hard or force the twist. Gravity and the weight of the lid do half the work for you. According to data compiled by the Beckley Foundation on herbal preparation methods, a consistent grind size improves vaporisation efficiency by ensuring more uniform surface area exposure to heat.
The grinder is made from CNC-machined aluminium with an anodised finish on the lid. Anodising creates a hard, non-reactive surface layer that prevents direct aluminium contact with your herbs. It's the same process used on cookware and food-grade equipment.
A 2-part grinder is simpler, faster to use, and easier to clean. You don't get a separate kief catcher, but you also don't lose potency to a screen. All your ground material stays in one chamber, ready to use immediately. It's the best metal grinder for people who value speed over kief collection.
The diamond-shaped teeth produce a medium-fine consistency — coarse enough to roll easily but fine enough for even burning. For an ultra-fine powder, you'd need to grind the same material twice, but one pass handles most dried herbs well.
We'd avoid it. Dishwasher detergent can strip the anodised finish over time, and the high heat may discolour the aluminium. Stick to hand-cleaning with isopropyl alcohol and warm water — it's faster and keeps the grinder looking sharp for longer.
Yes — the magnet is strong enough to keep the grinder shut in a pocket or bag without popping open. It won't survive being thrown across a room, but for normal carrying and use, the closure is solid. It's a clear upgrade over friction-fit plastic grinders that open if you look at them wrong.
Resin build-up on the threads is the usual cause. Wipe the threads with a cotton bud soaked in isopropyl alcohol every 2-3 weeks. If it's already seized, place the grinder in the freezer for 15-20 minutes — the cold makes the resin brittle and easier to break free with a firm twist.
Break your material into roughly 5-8mm pieces before loading. Anything larger may jam between the teeth, and anything smaller doesn't need grinding. Remove stems and seeds first for the smoothest twist and most even output.
With basic maintenance — brushing the teeth after sessions and wiping the threads every few weeks — an aluminium grinder like the Metal Grinder RQS typically lasts several years of daily use. The CNC-cut teeth don't dull the way moulded plastic teeth do, and the anodised finish resists wear from regular handling.
Absolutely. The Metal Grinder RQS ships in clean, discreet packaging from our Amsterdam warehouse. The anodised colour options — blue, green, and red — make it easy to pick a colour that suits the recipient. It's a practical, well-built gift that any herb enthusiast will actually use.
Yes. The medium-fine grind consistency produced by the diamond-shaped teeth is well suited for most portable and desktop vaporizers. A consistent particle size helps ensure even heat distribution during vaporisation, which is why many vaporizer manufacturers recommend using a metal grinder for preparation.
Last updated: April 2026
