ITEM: CAT40 5/811 45° 0.74 Diam Retention Knob ISCAR. MANUFACTURER: ISCAR. BRAND: Iscar. MANUFACTURER PART: 4503098. CAT40 5/811 45 0.74 Diam Retention Knob 0.64 Knob to Flange, 0.49 Neck Diam, 1.5 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: IscarRotary Tool Holders & AccessoriesRotary Tool Holder AccessoriesRetention Knobs & SocketsRetention Knobs.