ET series tip for the Weller PES51 soldering pencilStainless steel liner prevents tip from seizing to sensorET Series Tips - For EC1201A, EC1201AFE, EC1204, EC1001-1, EC2002m, WCC100, WES50, WES51, WESD51 irons. ETD Screwdriver tip - Size: 3/16".Brand: KD Tools, Model: ETD