A method of designing a compression tool jawset to displace a jawset and spring pin from an operative position thereof upon failure of a jawarm of the jawset at the spring pin location, the jawset comprising a pair of side plates (14, 16), a pair of jawarms having pivot pin openings receiving pivot pins between said side plates, each jawarm having inner and outer edges (34, 32) laterally spaced from and extending forwardly and rearwardly of the corresponding pivot pin opening, said inner edges including laterally inwardly open opposed jaw recesses forwardly of the pivot pin openings and inwardly facing cam surfaces rearwardly of the pivot pin openings, the jawarms during use of the compression tool being pivotal about the pivot pins in response to forces laterally outwardly against the cam surfaces to displace the jaw recesses laterally inwardly in a closing direction to compress an object therebetween, whereby an area of each jawarm between the corresponding pivot pin opening and inner edge thereof is under tension, a spring pin opening defined by opposed inwardly opening pin recesses on said inner edges of said jawarms between said cam surfaces and said jaw recesses, said pin recesses having opposed front ends and opposed rear ends with respect to front and rear ends of said sideplates (14, 16), each in said area of the corresponding jawarm, a cylindrical spring pin in said spring pin opening, said spring pin being axially and laterally captured between the side plates and spring pin recesses to establish an operative position, and a spring having a forward end extending across said spring pin and legs extending rearwardly each along the inner edge of a different one of the jawarms, said spring pin opening supporting said spring pin in the operative position and said spring biasing said jaw recesses in the closing direction, said method comprising: (a) analyzing at least one of the jawarms to determine that the stress at the pin recess thereof will result in a fatigue crack initiated at the pin recess during use and fracture of the jawarm from the pin recess to a point spaced therefrom toward the outer edge of the jawarm, (b) determining the amount of acceptable deformation of the jawarm along the fracture when the fracture reaches said point, the amount of acceptable deformation comprising an amount of deformation before oversized crimps would be made, and (c) modifying at least one of (i) the distance between opposed rear ends of the pin recesses consisting of increasing said distance between said opposed rear ends, and (ii) the spring pin consisting of reducing the diameter of the spring pin or shortening the length of the spring pin, so that the spring displaces the spring pin from the operative position when said acceptable amount of deformation is reached by either ejecting the spring pin from the spring pin opening or canting the spring pin in the spring pin opening thus jamming the jawarms, thereby providing an immediate indication of failure to an operator of the compression tool jawset, and in which the spring biases the spring pin rearwardly of the spring pin opening. (a) analyzing at least one of the jawarms to determine that the stress at the pin recess thereof will result in a fatigue crack initiated at the pin recess during use and fracture of the jawarm from the pin recess to a point spaced therefrom toward the outer edge of the jawarm, (b) determining the amount of acceptable deformation of the jawarm along the fracture when the fracture reaches said point, the amount of acceptable deformation comprising an amount of deformation before oversized crimps would be made, and (c) modifying at least one of (i) the distance between opposed rear ends of the pin recesses consisting of increasing said distance between said opposed rear ends, and (ii) the spring pin consisting of reducing the diameter of the spring pin or shortening the length of the spring pin, so that the spring displaces the spring pin from the operative position when said acceptable amount of deformation is reached by either ejecting the spring pin from the spring pin opening or canting the spring pin in the spring pin opening thus jamming the jawarms, thereby providing an immediate indication of failure to an operator of the compression tool jawset, and in which the spring biases the spring pin rearwardly of the spring pin opening.