Handle-Ken

The Handle Sword (ハンドル剣) is a bladed weapon wielded by Kamen Rider Drive, resembling the steering wheel from Tridoron. When summoned, it comes from the front portion of Tridoron's hollow section. Shinnosuke was the one who named the blade, though Mr. Belt disapproves of it.

The Handle Sword's blade is made from S0-1, an experimental compound that can also repair Shift Cars. The blade itself is very sharp, but it can be made even more powerful by turning the steering wheel on the hilt, which announces "Turn" (ターン) and powers up for the next attack. Performing three turn attacks in a row causes the Handle Sword to instead announce "U-TURN" (Ｕターン), allowing Drive to drift across the battlefield so that he can perform a powerful slash.

The Handle Sword can initiate Rider Slash finishing moves by loading Shift Cars into the slot behind the blade, with different finishers being performed depending on the Shift Car inserted.

Arms Weapon
The Handle Sword, alongside the Door Gun, is the Arms Weapon wielded by either an Armored Rider or a New Generation Rider when they transform into Drive Arms, which is assumed by Kamen Rider Gaim in Kamen Rider × Kamen Rider Drive & Gaim: Movie War Full Throttle.

Trivia

 * The way Drive turns the steering wheel on the Handle Sword to empower his slash is similar to how Kiva Emperor Form slides the Zanvat-bat on the Zanvat Sword to power up his slash.
 * Similar to Ryotaro Nogami and his Densha Giri/Train Slash finisher, other characters disapprove of Shinnosuke's poor naming sense.