Use this 8mm extra-long, diamond-studded, cutting bit in Side-Power's Tunnel Cut-Out Tool (6 8870) to create hull openings for mounting a thruster's tunnel.
Extra long 8mm Diamond Bit for die grinder – requires 8mm chuck
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm.
www.P65Warnings.ca.gov