Q Removable steel spindle nut: Rolled twin start Acme thread for precise operation and longevity. © Hardened and serrated jaws for maximal durability. The parallel jaw alignment system provides precise clamping and longer service life. O Possibility to attach snap-on jaws, clamping securely and safely and type of workpiece. Superiors come with build-in pipe Jaws. O Spindle housing protecting the nut thread to be exposed to abrasive dust and other external materials. Vices made of forged steel are significantly better than cast vices. The use of forged steel results in increased tensile strength and improved break resistance as well as greater dimensional stability, which leads to a higher overall value retention.