Each QCM base holder has two wire grips to hold the QCM gold chip and connect the electrodes to the instrument.QCM Base HolderSKU: 2020-0032-1PRODUCT INFOwire grip length: 0.6 cm Width: 1.5 cm Pin length: 0.6 cm SHIPPING INFOPlease contact sales@mipsinnovations.com directly for purchase 12 - 18 days after confirming payment