An On/Off Magnetic Work-Holding Square With 400 Lb. (182 Kg) Of Hold Force From Magswitch Technology. M6 * 1 Threaded Holes On All Sides And Machined At 90° Magnetic Grip On 5 Sides—Strong On 3 Sides. Allows For Super Fast Set-Ups And Instant Work-Holding And It Stays Clean; When The Square Is Off, Debris Falls Right Off. Grips Flat And Pipe For Better Versatility. Full Saturation Thickness Is 0.1345"/3.43Mm, 2:1 Shear Working Load Is 20 Lb./9 Kg.