#3 Scalpel handle. Knife handle. Knife. It is used for cutting skin. The #3 scalpel handle commonly uses blades: #10, and #11. When making long incisions, the #10 blade (which is shaped like the prow of a boat) is used. The other blade you have in your kit is the #11. The #11 blade is pointed and is used for lancing boils or opening swellings on the skin. Your scalpel blades are exceedingly sharp and can cut you to the bone with one accidental swipe.
This product is made in Pakistan and it is stainless steel so it is reusable after being sterilized.