Shift Brace

The Shift Brace (シフトブレス) is one of Kamen Rider Drive's transformation devices. In this case, being the device that holds Drive's Shift Cars as a remote for his Drive Driver. Initally used by Protodrive, it was inherited for the completed Drive, first tested by Kiriko Shijima before Shinnosuke Tomari was recruited to become the new Drive.

On two separate instances, duplicate Shift Braces were manifested by Roidmude 027 and Gold Drive, who both copied Drive's data to become Imitation Drive and Gold Drive respectively. Gold Drive's version is fully-colored jet-black in comparison to the original.

In the future, the Shift Brace is used by the future Drive, Eiji Tomari, before being taken along with the Drive Driver by the Paradox Roidmude who uses it to become Dark Drive.

Functionality
To transform, the user turns the Advanced Ignition (アドバンスドイグニッション) key on the Drive Driver and rotates a Type Change Shift Car into its Lever Mode before inserting it forwardly into the Shift Brace via the Shift Landing Panel (シフトランディングパネル) until the tip of the Shift Car hits the Chrome Guard Bumper (クローム ガード バンパー). Once the Shift Car is set, the user must hold the car and lift it up and down back into the Shift Landing Panel to finish the transformation sequence into Kamen Rider Drive, right after the Drive Driver announces "Drive: Type" (ドライブ・タイプ) and the corresponding Type used. The only Shift Cars usable to Drive when he is not transformed are the ones that change his Type forms.

After transforming with a Type Change Shift Car, the user has the option to switch between different other Shift Cars. To do so, the user must turn the Advanced Ignition, pull the used Shift Car out, convert the new Shift Car to Lever Mode, insert it back into the Shift Brace, and repeate the same lifting action. This would change the base Shift Tire from the Type, or any previous Shift Tire used before, and cause the Drive Driver to announce "Tire Koukan" (タイヤ交換) and then the corresponding Shift Car used.

If the Shift Car that is being used is lifted at least once, the user will be given a power boost, while the Drive Driver says either the Type used if a Type Change Shift Car is currently in use (ex. "Type Formula" would be "Formula") or the last name of a Tire Exchange Shift Car (ex. "Hooking Wrecker" would be "Wrecker"). Depending on the amount of times it is lifted, the Drive Driver repeats itself that many times, up to three, while also initiating different functions.

To initiate a finishing attack, Drive must turn the Advanced Ignition and press the Igniter (イグナイター) button on the Shift Brace, which makes the Drive Driver announce "Hissatsu" (必殺) with a revving noise being looped. Lifting the Shift Car afterwards would then give Drive an exceeding amount of power, as well as cause the Drive Driver to announce "Full Throttle" (フルスロットル) and then the corresponding Shift Car used. Though in the case of Shift Dead Heat, which doesn't have a Lever Mode, the Drive Driver instead just announces "Dead Heat" (デッドヒート) when the Igniter is pressed. Drive may now release the power gained in any way he wishes, unless the Shift Car does not comply. This is shown when Shinnosuke couldn't utilize the Dream Vegas Shift Car's Full Throttle, as he didn't get a jackpot.

In order to have the Drive Driver cancel the transformation, Drive must remove the Shift Car currently placed in the Shift Brace and press the Igniter. Sometimes, after a victorious battle, the Drive Driver would say "Nice Drive" (ナイスドライブ) as a compliment to the user's great job.

While Drive is in civilian form, the Shift Brace can either act as a navigator or receive messages. At the same time, the Shift Brace is able to have a physical examination for its user. It can also somehow act as a watch for Drive.

When Gold Drive is in possession of the Banno Driver, the Shift Brace is not a part of the transformation. Instead, it appears once he fully transforms into Gold Drive and only allows him to channel either his own power or the exploited weapon he hijacks. Once Banno steals a Shift Car or Signal Bike, he can load them into his Shift Brace and press the Igniter, allowing him to exploit their powers through either his combat techniques or one of his hijacked weapons. In one instance, he uses the stolen Signal Tomarle to activate the hijacked Zenrin Shooter's Full Throttle attack.