Tec Tools Knife Sharpening StoneFeatures:-

• Super fine stone material
• Coarse and Fine Surface
• High Grade Aluminium Oxide

A blade angle of 10-15 degrees is best for this tool. Achieve this by tilting the blade to appoximately 45-degrees, then by eye, halve the angle, then halve it again. The more acute the angle, the sharper the edge you can achieve.