- Joined
- Nov 27, 2012
- Messages
- 7,912
For ER collet nuts & wrenches, I see them referred to as UM or RU. Seems like the appropriate wrench is compatible with both types but what does they mean?
I'm looking to buy another ER wrench but it's not so common so I want to make sure I get the right one.
I'm looking to buy another ER wrench but it's not so common so I want to make sure I get the right one.