Handle-Ken

"Turn!"

- Activation announcement via 1st & 2nd steer

"U-Turn!"

- Activation announcement via 3rd steer

"Hissatsu: (Shift Car), Full Throttle!"

- Finisher announcement via Drive Driver

The Handle Sword (ハンドル剣) is a bladed weapon wielded by Kamen Rider Drive, resembling the steering wheel from Tridoron. It first appears in episode 4. When summoned, it comes from the front portion of Tridoron's hollow section. Shinnosuke is the one who names this weapon, though Mr. Belt disapproves of it.

Usage
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 if weirdly balanced, 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 a third Turn motion in a row causes the Handle Ken to instead announce "U-Turn" (Ｕターン) and allow Drive to perform the Turn Slash (ターンスラッシュ) attack, where he drifts across the battlefield so that he can perform a powerful slash.

Finishing attacks
The Handle Sword can initiate Full Throttle Rider Slash finishers by loading Shift Cars into the Shift Landing Panel (シフトランディングパネル) slot behind the blade after turning the Advanced Ignition on the Drive Driver, with different attacks being performed depending on the car used.
 * Dream Vegas: When Drive slashes an enemy three times, the number 7 appears with cards, chips, and lottery-related items bursting out, which then reflects an image of the number 777 on the enemy.
 * Speed: When Drive slashes an enemy, a blue automobile light trail appears and reflects a red then blue image of either a speedometer, a rev counter, or a fuel gauge.
 * Midnight Shadow: When Drive slashes, a giant energy shuriken is shot at the enemy.

If Drive presses the Handle Sword's "horn" after turning its steering wheel once, it announces "Drift Rotation" (ドリフト回転) and allows Drive to perform the Drift Slash (ドリフトスラッシュ) attack, where he spins like a top and slashes the opponent several times as each slash makes a red light-like circle appear, while also leaving skid marks onto the ground.

Arms Weapon
The Handle Sword 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/Den-O Liner Form and the lackluster christening of his DenKamen Sword's Densha Giri/Train Slash finisher, other characters disapprove of Shinnosuke's poor naming sense. In this case, Mr. Belt.