The ESKT3264LQFP_61355/6 is an adaptor dedicated for Holtek 32-bit MCU HT32F61355 and HT32F61356 64LQFP. It have to work together with the Holtek e-Writer32 V1.1 programmer. You can identify the e-Writer32 V1.1 and e-Writer32 based on the label on the back of the product.