Jumar climbing gear. . Pair of mint condition yellow 'Jumar' ascendeurs. Climbing ascenders, also known as Jumars, assist with ascending a rope. Essential equipment includes jumars (ascending devices), a harness, a climbing rope, locking carabiners, and a helmet for safety. Label inside grip reads, Made in Switzerland CH - 3713 Reichenbach. 2) The leader is freed from the responsibilities of belaying. Instead of climbing the rock, you will use jumars to ascend the rope. Blue handle for right hand. Chrome rope clamp. Jumaring and rope ascending in general is a fundamental skill all new climbers should get down.