Brand: Briney Tooling Systems B00KJAS6WK

Briney's Tru-Postion side lock end mill adapters are ground eccentrically guarantying 0.0002" or better T.I.R. at 4-times length to diameter ratio. Giving you twice the tool life you can get with any other standard side lock end mill adapter. Less run out for even chip load and less chance of chatter.