Special Discount Bolton Tools ER40 Nut Wrench Spanner for CNC Collet Chuck Nut ER40UM

1.No damage to the collet nut with the spanner, no skidding, thus accidents won’t occur.
2.Choose superior 42CrMo Ultra-high Strength Steel
3. The head of spanner is black oxide finish, the arm of spanner is chroming, Rubber appearance, comfort to use.

Product Description

1. The ER nut spanner adopts open end or annular groove design. Fix accurately and avoid skidding.
2. High quality medium carbon steel is adopted as materials of spanner head. The surface hardness of spanner is high and durable.3. Blackening the surface of the spanner and installing the rubber handle after chroming gives it a delicate appearance and comfort feel.4. Each batch of products would be sampled for toque testing to ensure the safety.