I dont have Vicmarc , but I agree with the two comments here. I have several SN2 Nova chucks and three of them have the equivalent of the Vicmarc shark jaws. Why three I often have several on the go at once and the shark jaws will do most everything for me as Gabriel mentioned, of course what you are turning will influence chuck jaws choice. But the shark type is very near to a universal jaw bowls or hollow vessels and if you have only one chuck its probably the best option to start with.