Fluke tl238 suregrip test lead set for high energy environments fluke fluke tl238 an accessory kit especially designed for working in high energy environments the suregrip test probe has only 4 mm of exposed metal at the tip test probes with less exposed metal help reduce the risk of inadvertent shorts between each other and other metal surfaces that could result in an arc flash explosion probe extenders fit between modular test leads and test probes increasing the distance between you a