ViseGrip™ Latch In engineering jargon, our ViseGrip™ latching mechanisms have an exceptionally high degree of mechanical advantage. What this means is that they require little force to operate but are exceptionally strong when locked down. Our aluminum ViseGrip™ latch is forged into a beautifully smooth and sculpted shape that fits your hand perfectly. On the hinge, we have a stainless steel hinge pin and brass bushings between moving parts for a silky smooth folding action. Our steel ViseGrip™ gets the same shape but in stainless steel for improved strength and durability.