Internal Expansion Collet Set
Worldmile Watch Tools
Watch Tool

Internal Expansion Collet Set

Internal expansion chuck set used to hold and open screw-down watch case backs with better stability and precision.
Includes 30mm, 35mm, and 40mm aviation aluminum dies, 10 pieces for each size.
Compatible with 6104 lathe for watch case back opening and polishing operations.

Strict QC
OEM / ODM Support
Factory Direct

In-stock products available for fast dispatch  ·  Custom OEM/ODM orders accepted — send us your technical drawings or specifications for a tailored solution.

Our Advantages

WHY CHOOSE WORLDMILE

01

DECADE OF PRECISION

Built on 10+ years of hardware processing expertise, every Worldmile watch tool inherits rigorous dimensional accuracy and material consistency.

02

ZERO-COMPROMISE QUALITY

Every product undergoes multi-stage inspection before shipment. Professional master craftsmen oversee each machine and each process.

03

FULL OEM / ODM SUPPORT

From in-stock standard tools to fully custom-engineered solutions, Worldmile handles it all. Submit your technical drawings or specifications for review.

Factory Direct
24h Response
Honest Service
WORLDMILE WATCH TOOLS
Dongguan, Guangdong, China