Amazon.co.uk: fine tooth saw- fine tooth back saw reviews 2017 reviews free ,Reviewed in the United States on April 25, 2018. Size: 12'' 100T Verified Purchase. So far this is an outstanding blade, especially for the price. I have laid half of an engineered bamboo flooring job (approximately 350 sq. ft) and the cuts are so smooth it's almost unbelievable.Compared Lists Of Best Sawzall Blade For Metal | 20213. DEWALT DW48 8-Inch 14 TPI Saw Blade. DEWALT DW48 8-Inch 14 TPI Straight Back Bi-Metal Reciprocating Saw Blade is an 8-inch blade that has 14 teeth per inch (TPI). The manufacturer uses a patent teeth design that makes for sharper tooth geometry thus faster-cutting rate.