Size:ER25UM Description:Precision spanner wrench, for professionals and hobbyists demanding ease of operation and high quality work results, for spring clamping nut CNC tool holder, Fits for most tool holders 1 x ER25UM WrenchMaterial:high grade steel Type:ER25UM Weight:230g Wrench Color: Black Cover Color: Red Feature: 1、This Is A "Brand new" Set Of Precision spanner wrench For Professionals And Hobbyists Demanding Ease Of Operation And High Quality Work Results. 2、Built in self-Release design and tools will never get stuck in holder. 3、Harden, wearproof, and durable, with skidproof cover, built in self-Release design and tools will never get stuck in holder