3 GoPro Extensions Strong Ends

These are inspired by these http://www.thingiverse.com/thing:731294 but I like my heavy duty ends and the nut holes were way small for the original acorn nuts.

I only used a his as a reference photo and nothing of the original model is in mine.

These are simply 3 different extensions. 2 short (one 90degree) and 1 long.The short one overall length is 93mm and the long one is 143mm