pivotal link 12 and pivotal handle 4 to urge the moveable jaw 2 b down the inner clamp surface 3 b away from the fixed jaw 2 a this opens the gripping angle ga the pivotal handle stop 4 d acts against the linking arm stop 5 d to ensure this action the pivotal handle cam 4 a is positioned such as to allow minimal grip upon the outer clamp surface 3 c fig1 shows in plan view the fifth embodiment of the pliers 1 engaging a fastener 1 11 a for illustration purposes the fixed handle top laminate 3 g pivotal handle top laminate 4 e and linking arm top laminate 5 e are shown removed the pivotal handle 4 is shown operated towards the fixed handle 3 as force f is applied causing the pivotal handle to pivot around the pivotal link 12 and the pins 12 a 12 b against the effect of the resilient member 8 until the action is arrested by the jaws 2 a 2 b coming against the workpiece 11 a during this movement the engagement of the pivotal handle cam 4 a with the outer clamp surface 3 c causes no effective clamping action on the fastener 11 a fig1 illustrates in plan view the fifth embodiment of the pliers 1 fully operated on a workpiece 11 b the top laminations 5 e 3 g 4 e have been removed in order to show the disposition of the various internal parts the pivotal handle 4 is fully operated.