ITEM: 5/16 Head Diam, 1/4 Shank Diam, 6 Flute 60° Solid Carbide Countersink HERTEL. MANUFACTURER: HERTEL. BRAND: Hertel. MANUFACTURER PART: 02389609. 5/16 Head Diam, 1/4 Shank Diam, 6 Flute 60 Solid Carbide Countersink Bright Finish, 21/2 OAL, Single End, Straight Shank, Right Hand Cut (MOQ1, Pkg Qty1)CATEGORIES: Maintenance, Repair and Operational (MRO) Supplies. Countersinks, Chamfer Mills & Back Chamfers. Countersinks & Sets. N/A. TOTAL RECYCLED CONTENT: 10.00%. POSTCONSUMER RECYCLED CONTENT: 1.00%. KEYWORDS: HertelCountersinks, Chamfer Mills & Back ChamfersCountersinks & SetsCountersinksN/A.