Manufacturing form Material to finish goods with well-development technic.Constructed of high-grade heat-treated alloy steel for maximum toughness and durability. Curved jaw puts tremendous pressure on four points of any style nut or bolt head with convenient wire cutter. Comfort grip on release lever, more  convenient to release pliers. Turn screw to adjust pressure and fit work and stay adjusted for repetitive use, Ideal for tightening, clamping, twisting and turning. with Nickel plated finish.