Olson 44802 5" Flat End Reverse Tooth Scroll Saw Blades 11.5 TPI - 12 Pack Olson 44802 5" Flat End Reverse Tooth Scroll Saw Blades 11.5 TPI - 12 Pack11.5 TPI 5" flat end reverse tooth scroll saw blades universal #7R. For tight radius cuts in hard wood to 3/4" thick, soft wood to 1 1/4" thick. Splinter-free, smooth finish on both top and bottom surfaces. Measurements: .045" wide, .017" thick. 846386