3/4 X 3/8 X 1/4" Pivot Head Knurling Tool, H & H Industrial Products, Mfr#: 2226-0005

3/4 X 3/8 X 1/4" Pivot Head Knurling Tool ~ Self-adjusting pivot head. ~ Shank size is 4-1/2 x 1/2 x 1/2". ~ Produces medium diamond pattern.