as a consequence the time and cost for the installation increased further as can be observed in fig1 and 19 retrofitting an aluminum door jamb to accommodate a prior art face plate 104 having a height y of 6 u215e inches and a width x of 1 u215d inches along with its associated 4 u215d inch h electric strike requires that the height h of the prefabricated cut out portion 102 be expanded from 4 u215d inches to 6 u215e inches additionally the width w of the cut out portion 102 needs to be expanded from 1 9 16 inches to 1 u215d inches and the depth d of the cut out portion 102 needs to be increased from 3 32 inches to u215e inches along a length l of 3 u215c inches in addition either one or both of mounting tabs 108 for face plate 104 must be replaced and relocated and one or both of holes 110 for securing mounting tabs 108 to door jamb 66 must be redrilled by employing the electric strike 10 and face plate 60 of the present invention see fig2 the amount of cutting of door jamb 66 and door jamb sidewall 106 during retrofitting is significantly less this is in part because face plate 60 of the present invention having a height y of 4 u215d inches is designed to be installed into an aluminum door jamb with an electric strike 10 of the present invention having a height h of about 1 11 16 inches or of about 1 13 16 inches furthermore face plate 260 of the present invention having a height y of 2 u215d inches see fig2 is designed to be installed into an aluminum door jamb with electric strike 10 of the present.