Circular saw blades make good broadheads.But Sean is right,they are not all created equal.Some will not hold an edge, but some will.You just have to experiment.When I cut mine out on a chopsaw,the steel that cuts cleanly,will usually hold a good sharp edge.On the other hand,the blade that leaves "flags" as you cut,is usually inferior.Most of my points range from 150-175 grains,and are about 1.25" wide,and a little over 2 " long,with a 3/4" tang.Hope this helps. God Bless