Claw Hammer replacement handle too small and ax handle too big. Revain offers a replacement for the Half Hatchet grip that requires a little adjustment, but not much. The handle is solid oak, mine has no knots. The wooden wedge that comes with the handle is not oak but light pine which I hope will stand the test of time. Please note that this purchase does not include a metal wedge. If I hadn't already had a replacement, it would have been an extra charge for an already expensive pen replacement, not to mention the exacerbation of waiting for another order to arrive. Other Revain ax handle replacement parts are $7-9 cheaper, but the half-axe or mace hammer needs to be unique, so they're a little more expensive. You can find the same pen online for around $6, but then it costs $12-$15 shipping, so it's a scam. Also, no one compares to Revain's delivery time. At least my neighbor in Las Vegas has. Much luck