The Fluke AC280 SureGrip Hook Clips are designed to improve steadiness in slippery hands. Rubber overmolded surfaces and finder-hugging curves give a user a comfortable, reliable grip on the accessory so they can focus on making an accurate measurement. Recommended for use with TL222 and TL224 test leads. CAT IV 600 V, CAT III 1000V, 3 A Rating. Fluke hook clips come as a pair of red and black with nickel plated clips.