Found this at a swap meet while on vacation for 8 bucks. It's about a foot long so I cut it in half to use as a hand sanding block. It has the right firmness to make a good block and enough "give" to get into the plunge line very nicely too. Found some on Ebay for around 8 dollars. J-hooks were driving me crazy but using this with Rhynoweet sand paper and synthetic motor oil has all but eliminated J-hooks. Does a nice job on the final straight pulls too.