This is a chuck guard that would suit many "Bridgeport" style milling machines. It is as fitted as standard to the Axminster Engineer Series X6323A machine. Supplied with an electrical interlock switch, which can be used to prevent the mill from being run without the guard in place. Fitting will require some mechanical skills, and we recommend that the services of a competent electrician is used to wire the interlock switch. This is a substantial guard, and would be a good upgrade for many older mills still in use.