thus when lever 82 pivots about dowel 87 b cam action occurs such that the position of rocker arm 87 a may move along central axis 62 c of free handle 62 lever 82 includes a cylindrical portion 82 a proximate an end thereof which may be slidably and rotatably associated with arcuate surface 62 d of body portion 62 a as shown for example in fig5 e rocker arm 87 a includes a cylindrical arcuate recessed portion 87 f in which bears against and seats a mating pivot or half round bearing 88 with a through hole 89 which may further be provided with a flat washer 88 a and internally threaded lock nut 88 b for use in coupling tensioning wire 58 to free handle 62 tensioning wire 58 may be fitted on its end with a coupling not shown having a sleeve portion that is swaged or otherwise compressed thereon so that the wire 58 is securely coupled to the sleeve in a preferred exemplary embodiment the coupling preferably is formed of steel and is configured as a swage stud while the lock nut is a nylock type lock nut a nut with a nylon insert to resist backing off integrally formed with the sleeve portion is an externally threaded end portion tensioning wire 58 may pass.