This product is a set of two core drill bits from the brand Hilti. One of the bits is 250mm long (9 inches) and the other is 202mm long (7 inches). They are designed for drilling holes in various materials using a Hilti drill. These drill bits are suitable for industrial use and are categorized under drilling tools. Perfect for heavy-duty drilling applications, these Hilti core drill bits offer precision and durability in their design and construction.