All 3M belts feature exceptionally durable cloth backings and smooth, strong splices to reduce chatter. The backings, adhesives and abrasive minerals used on each belt are all carefully matched to make sure they work together. This innovative construction helps the cutting surface stay cool, which minimizes loading and maximizes belt life. 3M Brand belts are economical and use a high-quality synthetic mineral. 3M Sine-Lok Splice, with its innovative, low-profile angle, reduces chatter, resulting in a smoother, flatter, more professional finish.