Here's one of the first strops I made, I guess about 10 years ago, and it has been my daily driver since. No bolster pieces, just fold-over construction. Cowhide, soaked and compressed, treated with neatsfoot, beeswax, and a dash of linseed oil. D rings were from an old climbing harness I had to condemn on a ship because it was past its expiration date, and I thought hey, these would make a real bad@$$ strop.