The Fluke TL175 TwistGuard Test Leads offer adjustable length test tips for use in different measurement environments. By simply twisting the test lead the user can change the exposed probe tip length from 19 to 4mm (0.75 in to 0.16-inch).?The adjustable tip shroud meets new electrical safety requirements to reduce tip exposure while providing the versatility needed for most measurements. The correct category rating for the tip exposure being used is always visible on the test leads. This makes the TL175 test leads suitable for use in many environments: n nCAT II 1000V nCAT III 1000V nCAT IV 600V