{"product_id":"3m-7100199423-hookita-321u-disc-6-inch-400-grit","title":"3M 7100199423 Hookita 321U Disc 6 Inch 400 Grit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe 3M 7100199423 is a Hookita 321U abrasive disc designed for automotive paint preparation and body repair work. It uses a blended mineral system that combines aluminum oxide with ceramic grain, giving the disc a broad cutting range across multiple stages of surface prep. The 6-inch diameter disc runs at 400 grit, making it well suited for fine sanding passes before topcoat application. An anti-loading coating keeps the cutting surface clear of dust and debris, extending disc life between changes. The Hookita hook-and-loop attachment system allows fast disc swaps without tools. Automotive body technicians and paint prep specialists are the primary users of this product.\u003c\/p\u003e\u003cp\u003eThis disc is used in automotive refinishing and collision repair environments where consistent scratch patterns and controlled material removal are required. The multi-hole pattern is engineered to align with most standard backup pads and supports dust extraction when used with a compatible vacuum system. It is appropriate for both spot repair and full-panel sanding on automotive body surfaces. The 400-grit rating positions it for intermediate to fine finishing steps in the paint prep sequence, typically following heavier cut stages and preceding sealer or primer topcoats.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBlended ceramic and aluminum oxide mineral abrasive for balanced cutting performance\u003c\/li\u003e\n\u003cli\u003e400 grit rating suited for intermediate to fine paint prep passes\u003c\/li\u003e\n\u003cli\u003eAnti-loading coating reduces clogging and extends usable disc life\u003c\/li\u003e\n\u003cli\u003eMulti-hole pattern supports dust extraction and aligns with most standard backup pads\u003c\/li\u003e\n\u003cli\u003eHookita hook-and-loop attachment for tool-free disc changes\u003c\/li\u003e\n\u003cli\u003eUpgraded resin bond improves durability and finish consistency\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with Hookita-compatible backup pads commonly used in automotive body and paint preparation applications. Multi-hole pattern aligns with most standard random orbital and rotary backup pads equipped for dust extraction.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and disc changes are performed by automotive body technicians using a compatible Hookita backup pad mounted to a random orbital or rotary sander. Confirm the sander and backup pad are rated for the disc diameter before use. Power down the tool completely before attaching or removing the disc. Follow shop safety protocols for dust management, including use of extraction equipment or an appropriate respirator.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisc Diameter\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrit\u003c\/strong\u003e: 400\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbrasive Mineral\u003c\/strong\u003e: Ceramic Aluminum Oxide blend\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAttachment Type\u003c\/strong\u003e: Hookita hook-and-loop\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Pattern\u003c\/strong\u003e: Multi-hole\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Weight\u003c\/strong\u003e: 4.67 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Length\u003c\/strong\u003e: 13.8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Width\u003c\/strong\u003e: 6.9 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Height\u003c\/strong\u003e: 7.3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: 3M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 7100199423\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"3M","offers":[{"title":"Default Title","offer_id":51344105734450,"sku":"7100199423","price":224.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310531627.jpg?v=1782029435","url":"https:\/\/voomisupply.com\/products\/3m-7100199423-hookita-321u-disc-6-inch-400-grit","provider":"Voomi Supply","version":"1.0","type":"link"}