The Osutoderuhammer50 (オストデルハンマー50,Osutoderuhanmā Fifuti) is the personal weapon of Kamen Rider Vice. Combining the Osutoderuhammer50 with the Ohinbuster50 forms the Revicelasher.
The Osutoderuhammer50 is composed of the following parts:
Osutoderu Head (オストデルヘッド,Osutoderuheddo): The main portion. The large-caliber, ultra-hard head creates tremendous destructive power as a striking weapon.
Osutoderu Trigger (オストデルトリガー,Osutoderutorigā): The trigger. When the attack target is confirmed, the safety is released and the attack is performed.
Osutoderu Grip (オストデルゴーグリップ,Osutoderugōgurippu): The grip. It acts as an energy path through which energy is supplied from the Revice Driver when grasped by Revice. In addition, it has a built-in Viststamp reading device which by setting in an inverted position can read simple genetic information and activate the finishing move Ostoderu Crash that applies the power of the species.
Osutoderu Knock (オストデルノック,Osutoderunokku): The operation device. It has a structure in which commands are input by pressing it strongly, and after pressing it once, the target data read by the stamp-type information input device Itadaki Injector is locked by pressing it again. This makes it possible to activate the finishing move Ostoderu Crash, which makes use of the characteristics of various substances
50 Connector (50コネクタ,Fifuti Konekuta): The coupler. The Osutoderuhammer50 and Ohinbuster50, which have been transformed in preparation for combination, are firmly connected while forming an energy bypass to become the combined weapon Revicelasher.
Itadaki Injector (イタダキインジェクター,Itadaki Injekutā): The stamp-type information input device. By hitting an object, its composition is read instantly and a pseudo energy body can be generated.
The Osutoderuhammer50's finisher is the Osutoderu Crash (オストデルクラッシュ,Osutoderu Kurasshu), which is performed by either striking an object or scanning a Vistamp. The attack will take on the attributes of the type of object that was struck or the power of the scanned Vistamp. Despite this, however, only two of these specific variants are seen and the Osutoderuhammer50 never once had scanned a Vistamp.
Vice strikes a car, causing a projection of the Osutoderuhammer50's seal to appear. Vice then spins, with his body surrounded by pink energy, while holding out the Osutoderuhammer50, which produces a trail of yellow and cyan energy. He approaches the target while spinning and crashes into them, continuously striking them with the Osutoderuhammer50. Vice then moves away and briefly stops spinning before starting again and resuming his attack. At the end of the second spinning attack, a yellow projection of the design on the Osutoderuhammer50's head to appear as the enemy is launched away.
Vice strikes a stone on the ground, causing a projection of the Osutoderuhammer50's seal to appear. Numerous balls of yellow energy emerge from the stone and float into the air before transforming into large rocks. Vice swings the Osutoderuhammer50, sending the rocks towards the target. The rocks then rain down, relentlessly striking the enemy and the surrounding environment.
Revi strikes Vice's Barid Shield, causing the Osutoderuhammer50 to be covered in light blue energy and emit freezing air from its head. Revi raises the weapon, which constructs a giant version of itself made of ice. Revi then swings the Osutoderuhammer50 downward, causing the ice construct to slam into the opponent and shatter upon impact.