To make a 2 bone - (Femur aka drumstick bone & Radius (small wingbone) call you will need this.
Now I do not use the other thigh bone for calls anymore as it just didn't give me the tone I needed. But the Drumstick bone with a Radius wingbone does make a good call and can double as a strker for any slate or glass friction call.
In fact I have taken drumstick bones and have added different wooden dowels to them and have made jsut strikers using this bone.
You will need to cut up from the thinnest part of the leg bone until you see the bone inside diameter. Cut to low taking the knuckle off and it is solid bone.
Here is the assortment of strikers I carry....
JW