Makeh B’Patish (Completing) - Breaking Down the 39 Melachot

The lens of your glasses pops out on  Shabbat. Are you allowed to pop them back in?   If the arm of your glasses got twisted or the  nose piece of your glasses got bent out of shape,   are you allowed to bend them back into shape?  If you have a hanger for your clothing and the   hanger got bent out of shape, are you allowed to  bend the hanger so that it will hang properly?   And let's say you have a safety pin that you're  using for your clothing and the needle got bent;   are you allowed to bend it back into shape  to be able to pin your clothes together?   One of the Melachot of Shabbos is the Melacha of  Makeh B’Patish, which means doing the final blow,   the final action to perfect an item. So, in  all of these cases, you're not allowed to pop   the lens back into your glasses, to bend the arm  of your glasses, the nose piece of your glasses,   to bend the top of a hanger, to bend the  needle of the clothespin. All of those   actions will complete and perfect the item,  and therefore they are not allowed on Shabbat.