This is the M4 crash protection device (break stem) #A-5003-0661. It will protect your tool setting probe and your cutting tool in the event of a crash. It is used on TS27R.
Break stems are designed to offer extra protection for tool setting probes and cutting tools in the event of a crash.

This is a functional replacement for obsolete part number A-5004-7443.

*Please note: if you require the full TS27R break stem kit, please order #A-5003-5171.