When using your 1000 volt (1Kv) CAT III meter, you also need CAT III (1Kv) leads and ends. The end cap on the leads makes a CAT II end a CAT III. Do not remove the removable cap. Once the cap is missing, there is too much metal. It is “distance” between your finger and the 1000 volts that makes a CAT III safer than a CAT II. Always wear HV safety gloves (we sell them too!) when measuring what could be high voltage. This kit contains leads, ends and alligator clips. Often bought with MAV002, MWK003, MWK010, MFZ001, MAV001 and MQJOO1.