NeuroTek constructs EEG electrodes which consist of stainless steel screws welded to a stainless steel leads. Electrodes can be easily screwed turned into holes that have been pre-drilled in the skull. Wire lengths should be specified. The common screw thread is #0-08 thread and has a ~1.4mm OD, with a length of 15mm. Requires slotted screw driver. Gold pin termination is compatible with P1 technologies.