Pferd 24582 Spherical Carbide Bur SD-5 Pferd Sale! from 2395 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Shank Diameter: 1/4" Head Diameter 1/2" Head Length 7/16" Cut: Double Shank Length: 1-3/4" Overall Length: 2-3/16" SKU:PFE 24582