{"product_id":"10lb-mjr-tumblers-400-600-grit-aluminum-oxide-third-stage-polish","title":"10lb MJR Tumblers 400\/600 Grit Aluminum Oxide - Third Stage Polish","description":"\u003cp\u003eIn this review of the 10lb MJR Tumblers 400\/600 grit aluminum oxide, the bottom line is simple: this bag is intended for hobbyists and small-shop users who need a dedicated third-stage shaping and pre-polish abrasive that works across brands. The reviewer found it useful as a refill for the stage 3 shaping step, delivering consistent abrasive action and predictable particle size for preparing stones before final polish. For those who want an American-made product from a disabled and veteran owned company, this grit is a straightforward, no-frills option.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Quality 400\/600 Grit:\u003c\/strong\u003e Provides a reliable abrasive for the third stage that helps shape facets and smooth surface scratches before final polishing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible with Any Tumbler:\u003c\/strong\u003e Works with most rotary and vibratory tumblers, so users can replace stage 3 media without changing equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge 10 lb Quantity:\u003c\/strong\u003e A sizable bag reduces the need for frequent repurchases for hobbyists and small workshops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminum Oxide Abrasive:\u003c\/strong\u003e The chemical and physical toughness of aluminum oxide gives consistent wear characteristics across different types of stones.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmerican Owned and Operated:\u003c\/strong\u003e Manufactured and sold by a disabled and veteran owned company in Pecatonica, IL, appealing to buyers who prioritize domestic sourcing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis product is aimed at rock tumbling hobbyists, lapidary beginners and intermediate users who need a dependable third-stage shaping grit that is compatible with a variety of machines. If you maintain a regular tumbling workflow and prefer buying in bulk to save time and avoid frequent restocking, the 10 lb bag suits that use case well.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere are professionals needing ultra-fine or industrially graded specialized abrasives beyond 400\/600, or users who expect every batch to produce a high-gloss final polish without a separate polishing compound. This grit is for shaping and pre-polish rather than final shine.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConsistent abrasive action that helps remove larger scratches and shape stones before polishing.\u003c\/li\u003e\n\u003cli\u003eCompatible with a wide range of tumblers, eliminating compatibility concerns between brands.\u003c\/li\u003e\n\u003cli\u003eGood value for a 10 lb supply for hobbyists who tumble regularly.\u003c\/li\u003e\n\u003cli\u003eSupports an American disabled and veteran owned company.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome users report variable final shine, so it may not replace a separate final polish step for glossy finishes.\u003c\/li\u003e\n\u003cli\u003eNot intended as a final polishing grit; an additional polish stage is often required for high-gloss results.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003e10 lb 400\/600 Grit Aluminum Oxide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAbrasive Type\u003c\/td\u003e\n\u003ctd\u003eAluminum Oxide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrit Stage\u003c\/td\u003e\n\u003ctd\u003eThird stage shaping \/ pre-polish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eCompatible with any brand of rock tumbler\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eMJR Tumblers (Disabled \u0026amp; Veteran Owned)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMade In\u003c\/td\u003e\n\u003ctd\u003ePecatonica, IL, USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe 10 lb MJR Tumblers 400\/600 grit aluminum oxide is a practical, American-made option for hobbyists and small workshops who need a reliable stage 3 shaping abrasive. It offers consistent performance and good bulk value, but users seeking a mirror-like finish should plan a separate final polishing step. Overall, it is a solid buy for its intended role and domestic provenance.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this grit suitable for all tumblers?\u003c\/strong\u003e\u003cbr\u003eYes, it is formulated to be compatible with most rotary and vibratory tumblers from different brands.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need an extra polish after using this grit?\u003c\/strong\u003e\u003cbr\u003eYes, this 400\/600 grit is intended for shaping and pre-polish; a separate polish compound is recommended for high-gloss results.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWho makes this product?\u003c\/strong\u003e\u003cbr\u003eIt is produced and sold by MJR Tumblers, a disabled and veteran owned company located in Pecatonica, Illinois.\u003c\/p\u003e","brand":"MJR Tumblers","offers":[{"title":"Default Title","offer_id":48261497848027,"sku":"B0CP8VR6WN","price":42.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51FmTcNLZ0L._SL1061_8890c50f-5001-43f9-9c71-d2c5b51604c3.jpg?v=1778349289","url":"https:\/\/gearmusthave.com\/products\/10lb-mjr-tumblers-400-600-grit-aluminum-oxide-third-stage-polish","provider":"GearMustHave","version":"1.0","type":"link"}