ITEM: Style C CAT40 5/811 45° 0.588 Diam Retention Knob PARLEC. MANUFACTURER: PARLEC. BRAND: Parlec. MANUFACTURER PART: C400TRKC. Style C CAT40 5/811 45 0.588 Diam Retention Knob 1.436 Knob to Flange, 0.19 Flange Thickness, 0.404 Neck Diam, 0.635 Pilot Diam, 2.48 OAL, Through Coolant, 0.157 Coolant Hole Diam (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.