The Silky Ibuki 15-2/5" (390mm) Curved Pruning Saw Replacement Blade (Extra Large Teeth) provides a greater cutting speed with less effort. Utilizes proprietary Silky 4-RETSUME (Four Rows of Teeth) Technology. Teeth are set in such a way that there appears to be 4 rows of them. Ideal for the toughest pruning jobs! The heavy duty blade with precision-ground, razor sharp blade 5.5 teeth per inch is designed to cut on a pull stroke and provides fast, clean and extremely smooth cutting. The hard chrome-plated blade resists rust and effects of tree resin, and wipes clean easily.