The HMO donut collection features precision-crafted head rings designed for secure fit, comfortable wear, and progressive weight options ranging from light everyday setups to substantial heavyweight systems.
Stainless Steel Donut Head Rings Guide
A precision-crafted design for comfort, conveniece and performance
Version
Weight Level
Width
Feel
Best For
Standard (10mm)
Light–Medium
10mm
Smooth & balanced
Everyday use
Heavy (15mm)
Medium
15mm
Grounded
Added weight
Extra Heavy(20mm)
Heavy
20mm
Solid & dominant
Maximum presence
⭐ Includes both HMO Classic donut systems and exclusive specialty designs.