ITEM: Style C CAT50 18 60° 0.904 Diam Retention Knob PARLEC. MANUFACTURER: PARLEC. BRAND: Parlec. MANUFACTURER PART: 5014TRK. Style C CAT50 18 60 0.904 Diam Retention Knob 1.77 Knob to Flange, 0.39 Flange Thickness, 0.667 Neck Diam, 1.026 Pilot Diam, 3.31 OAL (MOQ1, Pkg Qty1)CATEGORIES: Maintenance, Repair and Operational (MRO) Supplies. Rotary Tool Holders & Accessories. Rotary Tool Holder Accessories. Retention Knobs & Sockets. TOTAL RECYCLED CONTENT: 10.00%. POSTCONSUMER RECYCLED CONTENT: 1.00%. KEYWORDS: ParlecRotary Tool Holders & AccessoriesRotary Tool Holder AccessoriesRetention Knobs & SocketsRetention Knobs.