The guarantee applies to first time customers, first purchase only and tool’s must be used on the intended concrete type and compared with tools of the same grit size and designed for the same concrete type. Eligible Nufinish tools for the performance guarantee are the 20R, 20S, 20SS, 35R, 35S, 35SS, the purchaser is eligible for a maximum refund of the purchase price. This offer may not be combined with any other offer and expires Feb 29th 2012.