Magnetic Screwdriver With 32-Piece Bit Sets | Installs Vertically Into the Bottom of Wood Structures for Hanging Threaded Rod | Pvc Block Is Used for Storing the Bits. the Bits May Be Used for a Variety of Applications and the Block May Be Placed Onto Any Screwdriver for Storage | Used to Join Two Externally Threaded Parts of Equal Thread Diameter and Pitch, Often Two Pieces of Threaded RodFurbay Electric Supp