STRONG MAGNETIC HOLDING: Built with high-performance magnetic steel, this permanent magnetic chuck provides ≥150N/cm² holding force with uniform magnetic distribution, helping secure magnetic workpieces during grinding, milling, and precision machining. FINE POLE PRECISION DESIGN: Brass fine-pole panel with a 0.5+1.5 magnetic pole pitch helps this magnetic chuck for machining distribute force more evenly, supporting smoother surface grinding and more stable processing for thin or small workpieces. SEALED DUSTPROOF STRUCTURE: Sealed chuck body and treated panel help reduce dust and cutting fluid entry, allowing this fine pole magnetic chuck to support cleaner operation and repeated use in workshop machining environments. MANUAL SWITCH OPERATION: Included wrench and pressure plate screws make this magnetic workholding chuck easier to install, while the no-power mechanical switch helps maintain holding control without relying on electrical supply during use. WIDE MACHINING APPLICATION: Suitable for surface grinders, tool grinders, EDM, wire cutting, tapping machines, and bench drills, this magnetic grinding chuck helps hold various magnetic workpieces for metalworking and precision processing tasks.