The Reject Dial (排除貝(リジェクトダイアル) Rijekuto Daiaru?, literally translated as "Rejection Shell") is a fiercer version of the Impact Dial. It is extremely rare to find, and also extremely dangerous to both the target and the user. The Reject Dial takes in energy, just like the Impact Dial, but releases ten times as much energy as it had absorbed. The backlash effect is capable of blowing the bodies of both the user and opponent to pieces, especially with repeated usage. The Shandia, Wiper, is currently in possession of one, and frequently used it throughout the Skypiea Arc, despite being pleaded by others to stop using it. Wiper used the Dial along with the Kairoseki on his skates in a failed attempt to kill Enel.
Many Shandorian and Birkan warriors are almost entirely immune to the painful recoil of the impact force released from an Impact Dial. However, not many can take a hit from a Reject Dial: under circumstances, the impact would badly injure, or even kill, an ordinary person, even a soldier. During Enel's Survival Game, Shura was knocked out after Wiper used Reject Dial on him. Even though he was one of Enel's priests, this Dial proved enough to knock out, and even almost kill, Shura. The Reject Dial even almost killed Enel once (he survived by using his Devil Fruit powers to defibrillate his heart). For this reason, Reject Dials are generally frowned upon by allies of a user, as it may very well annihilate the user along with the victim.