down so as to cause plug 46 to engage first leg 98 of v shaped strip 94 so as to secure graft ligament end portion 96 in v shaped strip 94 and then screwed down further to wedge strip 94 and graft ligament 28 against wall 38 of opening 24 still referring to fig1 it is to be appreciated that bone opening 24 may be formed with a constant diameter throughout its length or if desired may be formed with two different diameters along its length in the manner shown in fig1 so as to form an annular shoulder 110 within the bone opening the provision of an annular shoulder 110 can be very helpful in ensuring that the graft ligament anchor is prevented from migrating further into bone b even if graft ligament 28 should thereafter be subjected to substantial retraction forces in a modification not shown of the fig1 embodiment the expansion plug 46 may be entered alongside graft ligament 28 and second leg portion 100 of strip 94 in this modified version the expansion plug 46 operates as described above except that expansion plug 46 engages graft ligament 28 and forces strip first leg 98 against wall 38 of opening 24 looking next at fig1 and 13 yet another form of graft ligament anchor is disclosed this graft ligament anchor is similar to the embodiment shown in fig6 except that the expandable sleeve 22b is in the form of a cylindrical coil sleeve 22b is formed.