AJMD K Real cast iron for real training.

AJMD K Threaded Solid Steel Handles

Pair of cold-rolled steel dumbbell handles with star spinlock collars

¥6900¥4900

  • 1 pair of 35 cm threaded steel handles with 4 spinlock collars
  • Machined from solid cold-rolled steel with zero hollow tubes
  • Standard 28 mm diameter holds standard cast iron plates
  • Diamond knurled handle provides firm mechanical hold
  • Four cast iron star collars with internal rubber O-rings
✓ In stock SKU: AJMD-TH-02 Threaded Solid Steel Handles
30-day returns
· Checked before dispatch

AJMD K Threaded Solid Steel Handles

Pair of cold-rolled steel dumbbell handles with star spinlock collars
Machined from solid cold-rolled steel rods. No hollow pipes, plastic end plugs, or fragile internal sleeves. These handles accept standard 28 mm plates and carry heavy loads without bending. Deep diamond knurling across the center section ensures hand traction during sweaty workouts. Each pair includes four solid iron star collars fitted with internal rubber O-rings that clamp tightly against plate faces to eliminate rattle.
CLEAN & SAFE INGREDIENT ASSURANCE
Solid steel core No hollow tubes Diamond knurling Four star collars Rubber lock O-rings High-density cardboard pack
HANDLE BUNDLES

Select handle quantity

1 Pair (2 Handles + 4 Collars)

Standard setup for building a complete pair of adjustable dumbbells
¥4900 ¥6900
  • ✓ Tracked dispatch
  • ✓ Tamper-evident safety seal
  • ✓ Ideal for a first order
  • ✓ 30-day returns
Most popular

2 Pairs (4 Handles + 8 Collars)

Keep multiple fixed-weight configurations ready without plate swapping
¥9400 ¥13800
  • ✓ Tracked dispatch
  • ✓ Lower per-unit price than a single order
  • ✓ One delivery, no repeat orders
  • ✓ 30-day returns
Best value

3 Pairs (6 Handles + 12 Collars)

Equip multiple workstations or full home circuit training layouts
¥13800 ¥20700
  • ✓ Tracked dispatch
  • ✓ Lowest per-unit price
  • ✓ One delivery for the whole supply
  • ✓ 30-day returns
1-CLICK INSTANT ORDER

Express 1-Click Order (Name + Phone)

Selected Package: 2 Pairs (4 Handles + 8 Collars) (¥9400)

Payment method
256-bit SSL Encrypted Cash On Delivery Available

Returns within 30 days

You have 30 days from delivery to return the product under our Returns Policy. Contact our team to initiate.

Katsumi Endo

Katsumi Endo

Biomechanics Trainer
12 years athlete preparation
Solid steel handles eliminate sleeve flex, keeping load transfer consistent across the wrists during heavy pressing. Reliable locking collars provide essential safety during overhead lifts.

Five reasons to use AJMD K handles

#1

Solid Metal Core

Not a hollow tube. One solid bar of cold-rolled steel.

#2

Diamond Knurled Grip

Textured center provides positive hold even with sweaty palms.

#3

Deep Thread Pitch

Fast collar rotation saves valuable time between plate adjustments.

#4

Anti-Loosen Collars

Internal rubber rings create friction to stop collar spin.

#5

Standard 28 mm Match

Universal fit for all standard 28 mm iron weight plates.

MACHINING

Precision lathe craftsmanship

01

Cold-Rolled Lathe

Machined from solid steel stock for maximum tensile strength.

02

Diamond Knurl Cut

Grip knurled under high pressure to create positive hand grip.

03

Thread Milling

Deep continuous threading allows rapid collar spinning.

04

O-Ring Compression

Internal rubber ring flattens against plates to resist loosening.

Heavy-Duty Transit Box

Packed in reinforced high-density cardboard with internal foam sleeves around each threaded section to protect threads from transit impacts.

BUILD YOUR DUMBBELLS

Order your solid steel handles

Fast insured dispatch with real-time shipment tracking.

1 Pair (2 Handles + 4 Collars)
¥4900
Select
2 Pairs (4 Handles + 8 Collars)
¥9400
Select
3 Pairs (6 Handles + 12 Collars)
¥13800
Select

User reports

★★★★★

"Noticeably solid. These are heavy steel bars that do not bend, and the collars lock down tight."

Shota N. Customer
★★★★★

"Grip knurling is clean without being overly sharp. Standard 28 mm plates slide on smoothly."

Tomoya O. Customer

Handle specifications FAQ

Are these handles hollow or solid metal? +

They are machined from solid cold-rolled steel rods throughout.

What size plates do these handles accept? +

They accept any standard weight plate with a 28 mm center hole.

Do the spinlock collars loosen during sets? +

The integrated rubber O-ring inside each collar compresses against the plate to prevent loosening.

What is the sleeve loading length on each side? +

Each threaded sleeve measures approximately 105 mm for stacking standard plates.

Delivery & payment Returns & refunds Terms & conditions