ER40 UM Type Wrench Spanner
Name: UM nut wrench spanner
Model: ER40UM
Material:45# steel
Hardness: HRC42-44
Usage: Hook spanner type UM wrench, CNC Collet Chuck Wrench Spanner for ER Type Shank
Features: Suitable for nut rotation of ER-type shank, arbor, and extension rod. Made of high-quality high carbon steel, heat treated, high hardness. High work efficiency and long-term use are not easy to fatigue.
- Product Introduction
ER40 UM type wrench spanner
Product Description:
Name: UM nut wrench spanner
Model: ER40UM
Material:45# steel
Hardness: HRC42-44
Usage: Hook spanner type UM wrench, CNC Collet Chuck Wrench Spanner for ER Type Shank
Features: Suitable for nut rotation of ER-type shank, arbor, and extension rod. Made of high-quality high carbon steel, heat treated, high hardness. High work efficiency and long-term use are not easy to fatigue.


Quality Control
We have QC staff staying on the production line to check. All products must be inspected before delivery. We conduct online inspections and final inspections.
1. All raw materials are checked after they arrive at our factory.
2. Check all parts and signs and all details during production.
3. Check all packaging details during production.
4. All production quality and packaging are checked in the final inspection after completion.












