Durability and Long LifeOur flexible diamond products, including 3M™ Flexible Diamond Cloth Sheet 6001J, are designed to help you achieve improved finishes on a wide range of hard-to-grind materials – without sacrificing cut rates. The primary difference between our diamond products is the abrasive backing. Choosing the right backing depends on operator preferences and the application.The backing on 3M™ Flexible Diamond Cloth Sheet 6001J is an x-weight cloth backing. The semi-flexibility of the x-weight backing enables this diamond abrasive to move forgivingly over the workpiece, responding to edges and contours. It’s one of the reasons this abrasive is uniquely suited for contour finishing.A metal bond securely anchors micron-graded diamonds to a premium cloth backing in an open dot pattern. Metal bonds are known to be tough and durable when it comes to adhering mineral to a backing.Three Patterns3M™ Flexible Diamond Cloth Sheet 6001J comes in three patterns: 18, B2 and 21. Here's how to distinguish between the three: 18 is a small-dot pattern, designed for fine finishes; B2 is a medium-dot pattern designed for aggressive cutting action and has improved coolant flow, given the spacing of the dots; 21 is the largest dot pattern and it's ideal for applications where loading is a problem, as the gaps allow for swarf and debris to escape. Generally, larger dot patterns are more aggressive and will perform better in stock removal applications, whereas the smaller dot patterns will produce finer finishes, grade for grade.Overall, the open dot pattern – whether spaced out or condensed – helps produce aggressive cutting action while reducing loading. Given its dual strength and flexibility, our 3M™ Flexible Diamond Cloth Sheet 6001J is a great abrasive for your hard-to-grind materials.