Designed to provide decades of service, these cast Machinists' Vises carry Reed’s lifetime warranty. Malleable or ductile iron bar, body, and base with a machined work surface. Replaceable hardened tool steel jaw facings for long jaw life. Lubricated thrust bearing to reduce wear. Swivel base machinists' vises feature positive locking. Both stationary and swivel base models are available. A swivel base can be retrofitted to stationary base models.