ITEM: 5 Piece, 1/16 to 9/16 Head Diam, 90° Included Angle, Single End Countersink Set MSC INDUSTRIAL. MANUFACTURER: MSC INDUSTRIAL. BRAND: MSC Industrial. MANUFACTURER PART: SC50905S. 5 Piece, 1/16 to 9/16 Head Diam, 90 Included Angle, Single End Countersink Set 1/2 to 1/4 Shank Diam, High Speed Steel (MOQ1, Pkg Qty1)CATEGORIES: Maintenance, Repair and Operational (MRO) Supplies. Countersinks, Chamfer Mills & Back Chamfers. Countersinks & Sets. Countersink Sets. N/A. TOTAL RECYCLED CONTENT: 10.00%. POSTCONSUMER RECYCLED CONTENT: 1.00%. KEYWORDS: MSC IndustrialCountersinks, Chamfer Mills & Back ChamfersCountersinks & SetsCountersink SetsN/A.