Adjustable tip length allowing increased safety and precision. Compatible with the TL22x series TL238 and TL27 test leads. Patented TwistGuard extendable tip shroud meets the highest electrical safety requirements to reduce tip exposure while providing the versatility needed for most measurements. Ratings: CAT II 1000V CAT III 1000V CAT IV 600V 10A maximum Pollution Degree 2. UL Listing. Probes always show correct category rating for tip being used. Environmental ratings: -20 to 55 degree C (-4 to 131 degree F) altitude: 2000m (6562 ). 1 Year .