Felco 903 Diamond Sharpening StoneWith continued use your secateurs will eventually need sharpening. This Felco diamond coated sharpening stone can be used with any secateur or shear. We find diamond stones to be a little more abrasive that whetstones and I would recommend them for when re establishing an edge on a very blunt blade, rather than routine sharping tuning. 11cm long and 2 cm at its widest.