Sleds, helmets, pants and jackets for rent at Frognerseteren to be used in Korketrekkeren when the toboggan run is open. You may return your sled at the bottom of the hill for a fee of 25 NOK to avoid having to take the metro back up to Frognerseteren.
Skiservice also has a small shop and snack bar.
Skiservice offers group events in Korketrekkeren with e.g. "after-sledding" in front of the fireplace with great views of Oslo.