1/8" centerless-ground carbide round, split both ends, 1-1/2" long.
A centerless-ground solid carbide blank for grinding your own form tools. It is 1/8" diameter and 1-1/2" long, with 3/8" of split ground into both ends.
Centerless grinding holds the diameter to +.000-.005", so the blank runs true in a collet without dialling it in.