DUROCK V3 Stabilizers are PCB mount screw-in Stabilizers that feature a patent design and precision upgrade models to totally avoid wire drop out. The Upgrade V3 stem/slider is Pre-clipped, Smaller Wire Gap and Creative ELASTIC SUPPORT BASE to Minimize the wire wobble and noise, Less Tuning and Easier to use. Well selected Premium Polymer Nylon materials, the Stainless Steel Wires and hardware are sourced from Japan and with nice solid coating to prevent Oxidation. DUROCK Screw in Stabilizer V3 is designed for 1.6mm PCB Keyboards, with the Washers and Soulmate Tuning Kit, it is compatible with most of 1.2mm to 1.6mm Pcbs. DUROCK V3 PCB Mount stabilizer Kit is for Screw in Keyboards only ( Washers, Screws, Soulmate Tuning Kit, both 6.25u and 7u Spacebar Wires included ). 80% Kit=2ux4, 6.25ux1, 7u wirex1