EDMT (All-Purpose Variable Pole Design) Alternating thick/thin magnetic poles provides best holding power for both thick and thin workpieces. • EDM-READY: fully submersible, brass welded faceplate which can be machined if needed, and protects the magnetic system from penetration of coolant. • Needs no electricity. Provides a constant source of workholding power. • Low-profile design increases Z-axis stroke • Housing and bottom plate are free of magnetism - will not magnetize machine bed or bearings.