i don't think if wooden hammers use a handle like that. (guess it's the enormous material impact a hammer hit gives to the material that it might shatter the grip into pieces - anyways, i searched and didn't find a single hammer with a detached handle like that

)
it's more one solid wood piece like here:
http://www.allproducts.com/tool/ark/12-camp_axe.jpg
for your next render YOU SHALL TURN THAT SHARPENING ON A BIT !!!
it looks like a wimsy handshake all over with that blurry look to it
i don't know what tool you're using, but if you use max, catmull rom is the way to go.
if any other tool, your desired painting app is your choice of sharpen the image
AND on top of that, finish that genius piece NOW !