AJMD K Real cast iron for real training.
AJMD K
Solid Cast Iron Free Weights

Real cast iron for real training.

Heavy-duty cast iron dumbbells with knurled steel handles. Built for daily strength work at home.

We build cast iron dumbbells without plastic fillers, sand, or weak seams. Every piece is weighed and checked by hand before leaving our shop.

Solid Cast Iron Free Weights

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Clear Metal Specs Pure iron and steel details
Hand Inspection Scale checked before box seal
Reinforced Cartons Padded corner transit protection
30-Day Window Unused in original packaging
Bank Transfer Direct settlement option
Cash on Delivery Pay directly at your door
Hand-checked for balance• Direct Dispatch• Hassle-Free Returns• ✓ Insured & Protected Delivery• Hand-checked for balance• Direct Dispatch• Hassle-Free Returns• ✓ Insured & Protected Delivery•
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Solid Cast Iron Hex Dumbbells
★ NEW ARRIVALS 2026

Solid Cast Iron Hex Dumbbells

Six-sided heads stop rolling during pushups and floor presses. One-piece cast iron design eliminates loose bolts, rattling plates, and rubber odors.

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Classic Round Head Dumbbells

Classic Round Head Dumbbells

Short overall length keeps weight centered directly over your wrists. Single-pour molten iron construction resists drops without cracking or splitting.

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Standard Cast Iron Weight Plates

Standard Cast Iron Weight Plates

Machined center holes slide onto standard bars without binding or sticking. Thin plate profile fits maximum weight on compact dumbbell handles.

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Direct Dispatch
Hassle-Free Returns
Hand-checked for balance
Bestsellers

Bestsellers

Stock levels show live on every item page.

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BESTSELLER AJMD K Cast Iron Hex Dumbbells
Solid Cast Iron Hex Dumbbells

AJMD K Cast Iron Hex Dumbbells

¥7900 ¥5900
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STAFF PICK AJMD K Solid Iron Kettlebell
Solid Iron Kettlebells

AJMD K Solid Iron Kettlebell

¥8200 ¥6200
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FEATURED AJMD K Standard Cast Iron Weight Plates
Standard Cast Iron Weight Plates

AJMD K Standard Cast Iron Weight Plates

¥7500 ¥5400
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ESSENTIAL AJMD K Threaded Solid Steel Handles
Threaded Solid Steel Handles

AJMD K Threaded Solid Steel Handles

¥6900 ¥4900
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BESTSELLER AJMD K Solid Cast Iron Hex Dumbbell Pair
Solid Cast Iron Hex Dumbbells

AJMD K Solid Cast Iron Hex Dumbbell Pair

¥7900 ¥5900
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FOUNDRY PICK AJMD K Solid Iron Training Kettlebell
Solid Iron Kettlebells

AJMD K Solid Iron Training Kettlebell

¥7400 ¥5400
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GYM ESSENTIAL AJMD K Standard Cast Iron Weight Plate Pair
Standard Cast Iron Weight Plates

AJMD K Standard Cast Iron Weight Plate Pair

¥6900 ¥4900
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ORGANIZER AJMD K Cold-Rolled Steel Dumbbell Rack
Steel Dumbbell Storage Racks

AJMD K Cold-Rolled Steel Dumbbell Rack

¥8900 ¥6900
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● Listed pairs on shelves & ready to ship
Crates packed and assigned to tracked couriers
Send returns back within the terms posted on our Returns page

Raw Materials Built for Heavy Loads

Industrial metals selected for density, grip friction, and surface resilience.

Core Casting Foundry poured grey iron

Class-30 Grey Cast Iron

High-density solid iron creates compact heads that withstand drops on rubber mats without cracking.

✓ Weighed before boxing
Load Handle Solid steel bar stock

Cold-Rolled Steel Shaft

Provides straight tensile strength through the handle core so the dumbbell stays rigid under high loads.

✓ Weighed before boxing
Outer Barrier Baked industrial polymer

Matte Electrostatic Powder Coat

Seals the raw metal against sweat and ambient moisture to stop surface oxidation.

✓ Weighed before boxing

Progression: Simple Daily Dumbbell Protocol

A dependable three-part framework to build strength using free weights at home.

01

Establish Baseline Movement

Start with floor presses, goblet squats, and rows to build core stability and dial in your grip feel.

02

Increase Loading and Sets

Add repetitions and slow down the lowering movement over several weeks to build muscle endurance.

03

Sustained Strength Routine

Maintain your training cadence with compound dumbbell exercises that fit your daily schedule.

How customers use it

★★★★★ Customer review
Fixed Hex Dumbbell Pair
★★★★★
✓ Verified Buyer

"The knurling feels sharp enough for a deadlift without tearing up my bare hands. Very solid cast heads, no wobbles after months on the mat."

Daiki M.
Yokohama, JP · Using for 4 months
Adjustable Iron Handle Set
★★★★☆
✓ Verified Buyer

"Weighed both dumbbells on my home kitchen scale out of curiosity. They matched up closely. Packaging had thick foam edge protectors."

Taro K.
Osaka, JP · Using for 2 months
Solid Round Iron Dumbbells
★★★★★
✓ Verified Buyer

"Much smaller footprint than the bulky vinyl weights I used before. I can do overhead presses without the bells bumping together."

Sora N.
Tokyo, JP · Using for 6 months

Frequently Asked Questions

Are these dumbbells filled with sand or concrete?
No. Every dumbbell head is poured from solid grey cast iron. There are no sand cavities, cement mixtures, or plastic liners.
What payment options do you support?
We accept cash on delivery and direct bank transfer. You can pay the courier directly when the parcel arrives or transfer to our bank account after ordering.
When does my order ship out?
Orders placed before 14:30 on business days are dispatched the same day. All shipments are double-boxed and sent with online tracking.
What is the return policy?
We accept returns within 30 days of delivery. Dumbbells must be completely unused, free of scuffs or chalk, and in their original packaging.
Direct Warehouse Shipping

Ready to Load Solid Cast Iron?

Browse the full weight line with parcel tracking and a 30-day return window.

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