Mad Hatter Guitar Products SVST-PJB Solderless Tone Shaping System Single-Volume Single-Tone Bass Kit with Blend Pot Complete solderless design for easy installation Specially designed, and exclusive to Mad Hatter Guitar Products, CTS Dual Value Potentiometer for improved tone and operation Mad Hatter Solderless Single Volume Board allows easy connectivity and switching control of the CTS Dual Value Potentiometer from 500k to 250k to achieve the best tone for your instrument Switch craft Output Jack for quality operation and reliability