shorten the plunger once the desired length is obtained by turning the push head the lock nut 94 is tightened against the end face of the slide rod to prevent further rotation of the push head thus the length of the plunger can be easily adjusted using ordinary tools that are always available a push rod 96 connects to the clevis 88 of the slide rod 84 by means of a groove pin 98 the groove pin fits transversely through aligned openings in the clevis and slide rod a second groove pin 99 joins the other end of the push rod 96 to a handle 100 the handle has an elongated arm 102 connected at one end to a clevis 104 aligned openings in the clevis 104 receive the groove pin 99 another set of openings in the clevis receive a handle anchor pin 106 anchor pin 106 extends through the holes 22 in the ears 20 to mount the handle for rotation about the pin an anchor pin screw 107 threads into the end of the pin 106 to fix it in position the anchor pin 106 also fits through a torsion spring 108 one leg of the spring engages the inside of the heel 18 and the other leg engages the arm 102 to bias the arm away from the heel a u shaped wire hasp 110 has free ends which slip into either end of the transverse hole 28 in the beam 24 the hasp pivots between open and closed positions where it either releases the handle or holds it in the closed position of fig1 a handle grip 112 slides over the arm 102 to provide a comfortable surface for a user to grasp the hasp 110 is large enough to.