Overview Medtronic offers a versatile range of reusable specialty electrodes and extensions to help you match the accessory to the surgical application. The selection of reusable devices includes blade, needle, ball, angled ball, loop, and conization electrodes. Reusable extenders in 3-1/4 in. (8.3 cm) and 11 in. (28 cm) lengths facilitate access to deep surgical sites and are compatible with all Covidien specialty electrodes and pencils.