The Kincrome 100mm Swivel Base Bench Vice is manufactured from “UNBREAKABLE” Spheroidal Graphite (S. G Iron), which is 100% stronger than standard grey iron, making it truly Heavy Duty and a must have for any home, professional or industrial workshop. The accurately knurled spindle and replaceable hardened, tempered jaws ensure that your workpiece is held tightly and accurately in position. The swivel base allows the vice to rotate in a full 360° motion and can be locked into position. The vices can also be removed from the swivel base and mounted directly onto your workbench.