62328 Features: -No more frayed edges and discs falling apart . -The new ceramic grain self-sharpens thus cutting cooler and lasting longer than all other grinding discs . -Quick, tool-free disc change to eliminate time wasted and increase production . -3'' Norton 36 Grit SG Blaze Speed-Lok TR Discs. Product Type: -Bonded Abrasives. Generic Dimensions: -Available in 2" and 3" discs for even the hard to reach jobsSpeed-Lok TR discs allow for quick, tool-free disc change and increased production. They twist on and twist off and lock securely to the back-up pad. Norton SG Blaze self-sharpening design is ideal for high-pressure, heavy metal removal applications. 25 per package.. Dimensions: Overall Product Weight: -0.9 Pounds.