not in place when the pressure below reaches some threshold value in applications like gravel packing frac packing etc the combined tensile force may be large enough to shear the shear screws undesirably in the embodiment shown in fig1 3 when the pressure below reaches some value sufficient to overcome the spring force which is smaller than the threshold value to shear the screws the holding collar 90 will be shifted towards the collet fingers 40 to contact and lock the collet fingers 40 into a groove in the bottom mandrel 100 after the collet fingers 40 are locked into the groove the tensile force will go from the mandrel 120 bottom mandrel 100 gage ring 110 lower cone 20 to the anchors 10 the load path is taken around from the shear screws 30 so they are protected from the shear load when desirable in situations where the tensile force is less than the nominal shear strength of the shear screws the protective mechanism need not necessarily be in place for example if the force is less than 95 of the shear force of the screws or less than 90 of the shear force of the screws or less than 85 of the shear force of the screws or less than 80 of the shear force of the screws or less than 75 of the shear force of the screws or less than 70 of the shear force of the screws or less than 65 of the shear force of the screws or less than 60 of the shear force of the screws or less than 55 of the shear force of the screws or less than 50 of the shear force of the screws when it is desirable.