In reply to Gaz22:
Loop a sling through the bale at the side you're initially pulling out. Stand on sling (put your foot through loop to avoid any slippage/castration) whilst holding crampon sideways on and pull steadily to achieve necessary force Remember to orientate the flatter stamped part of the bale to the correct angle of the hole.
If this is unsuccessful probably get ready to apply elastoplast to hands leg and nuts
Post edited at 17:33