Our Diamond Sharpeners are usually effective for 8 to 12 months with regular use. After that time the grit can wear thin, so it pays to replace them to ensure your blade is kept razor sharp at all times. 
A blunt blade takes a lot of work to return to razor sharp as High Speed Steel (HSS) is very tough. 
Don’t let blades get blunt – it’s so quick and easy to keep them sharp.        
 
Price is just $15 AUD.