has elongated sides 56 flat ends 40 and 42 of insert 32 face these sides 56 of course the invention extends to a single insert as shown in fig3 a in assembling the attachment 22 the inserts 32 are initially inserted into openings 60 within pre molded composite material 30 they could additionally be molded within the material 30 an adhesive may be placed on the metallic insert to secure the metallic insert within the opening 60 weight reduction or strengthening opening 62 see fig3 b may be formed within the composite material 30 as desired fig4 shows a subsequent step wherein an adhesive layer plurality of fiberglass plies and an outer adhesive 36 are all attached to the composite fan case 20 at a bottom of the composite material 30 the upper combination includes plurality plies of fiberglass 34 with an adhesive layer 36 attached to the outer surface of the composite material 30 then as shown in fig5 the attachment 22 then has holes 80 drilled through the outer fiberglass and adhesive combination 34 to align with holes 50 and which then receives inserts 82 which are threaded a helical insert or key lock insert may be utilized as the inserts 82 examples of brand names would be helicoil u2122 or keensert u2122 each of these inserts is threaded into the holes 50 in fact the holes 50 can be formed with threads to receive the inserts the point of the insert is generally to provide a breaking point which will break away from the.