Bosch 65 Piece High Speed Steel Hex Shank Screwdriver Bit Set Transitional Outdoor Lighting High Holding Power: Ring spiral shank it is listed for High Holding Power: Ring spiral shank design helps prevent backing out over time This compact shower kit carves a luminous Series Name N A Sub Brand N A Bit Size Set Bit Length Set Head Type Set Shank Size Set Shank Type Hex Double Ended No Coating Uncoated steel Case Type Hard Package Quantity 65 Set Individual Set Material High speed steel Warranty None CA Residents: Prop 65 Warning(s) No Brand Model Compatibility Fits most drill drivers Wide selection of bits – featuring both driver bits and drill bits