About this item

• Package Content: Includes 4 x M25 ER20A clamping nuts.
• Model: ER20 A, Material: 40CR steel and black oxide finish. Precision ground and hardened.
• Feature: After precision grinding and hardening, the hex nut can be a great replacement for the broken part and can fit most tool holders.
• Suitable for: The hex nut can work with ER type tool handle, boring cutter, tool bar, extension bar nut holding drill bit and other tools.