Sometimes we find gadgets or utensils in the kitchen that we have no idea how to use. At least with cheese knives and other cheese serving utensils, we know what type of food they should be paired with. But do you know which cheese knife should be used with which type of cheese? This was a mystery to me and to some of my colleagues, so we did a little digging, and here's what we found - use the image below with the numbered cheese utensils for reference:

#1: This is a 'half-heart' or pear-shaped knife, used for cutting chunks of hard cheese such as Parmesan. Start with the tip of the knife when you start cutting to reduce crumbling. 
#2: The wide knife is used for shaving firm cheese or serving crumbly cheese - think blue cheeses - on its large surface area.
#3: The cheese fork is versatile and good for serving soft to firm cheeses, holding a block of cheese in place as it's sliced, and for breaking apart hard cheeses that are meant to crumble. 
#4: The rectangular cheese knife is used for serving soft to semi-firm cheeses; the sharp edge will cut and the flat surface serves.