Wera 073680 Screw Gripper Attachment Set for Insulated Screwdrivers VDE screw gripper for use with insulated screwdrivers. Holds the screw securely on the tip of screwdrivers long bits and L-keys Suitable for round and hexagon blades with a diameter from 4.5mm to 6.0mm and 6.5mm and 8.0mm. Works without magnets Free spinning sleeve makes it easier to guide the screwdriver