I recently picked-up a Lyman 356402 4-cavity mold and found that I do not have any handles to fit. Seems the mold slot is 1/4" and my handles are 5/16". I have been trying to determine how to remedy this and have seen information on a Lyman "nutcracker" handle. Picture attached. Is this what I need for the 1/4" mold? Are there other options that are available? Thanks in advance for any assistance.