The Faithfull Mechanic's Bench Vice is manufactured from high quality grey iron castings which is a material renowned for its immense strength under compression and excellent shock absorbing capabilities. These robust vices are machined to close tolerances and are designed for smooth operation and reliability. The main spindle is fully enclosed to protect the threads from contamination and damage. Suitable for medium to heavy-duty applications. The Faithfull FAIVM4 Mechanic's Bench Vice has the following specification: Jaw Width: 125mm. Max Jaw Opening: 180mm.