Saddlers harness awl blades for leather work. It is made by the same manufacturer as System S+U needles with high-quality steel from Germany. Diamond point. Best awl blades for your custom awl handles.
 
B is the more durable all-round version, while BS is sharper and better suited to finer work but is more fragile and more prone to breakage if used on thicker or harder leather. Many users prefer to purchase the B range then grind it and narrow down to their desired width.