# 3 [https://www.amazon.com/Ultra-Sharp-Diamond-Sharpening-Stone/dp/B01FPP46W2/ Ultra Sharp™ brand diamond sharpening stones], 8" x 3", in grits 300, 600, and 1,200 | # 3 [https://www.amazon.com/Ultra-Sharp-Diamond-Sharpening-Stone/dp/B01FPP46W2/ Ultra Sharp™ brand diamond sharpening stones], 8" x 3", in grits 300, 600, and 1,200 |