Premium Diamond finished steel rod, 600 grit Steel rod, Mohs 10, L12 in. Dia 0.5 in. handle length measures 5 in. with plastic handle and hanging loop. The best quality and workmanship. To clean it, washed it and wipe dry completely or use non-woven cloth soaked in cooking oil to wipe the rod and dry it. Manufactured by Master Grade, the expert in the sharpening Made in Taiwan.