Carboloy BOS40-EM 2.31-0250 Tool Holder is a 1/4-inch end mill holder in Carboloy's BOS40-EM family, catalog code 2.31-0250. It includes the RS4E-0216 stud, aligning with RS4E-style toolholding configurations. Designed for secure, repeatable seating of a 1/4" end mill in CNC milling setups, this holder supports standard 1/4" end mills and is intended to integrate with Carboloy's BOS40-EM tooling platform.
