Hear It Work. The Havoc gives you audible and tactile feedback with every pass. You hear it over the motor and feel it through the housing as the blade moves through the cut. Check your base before you order The Havoc mounts on the two-screw V2 base only. Look at the back of your clipper head and count the screws. Two screws, one on each side, and the Havoc drops straight on. One screw in the middle is the earlier base, and the Havoc will not mount on it. One screw in the middle? Get the Havoc Blade + Switch Kit Bundle instead. The Switch Kit replaces the whole front end with the two-screw base, and then this blade fits. Every Cyclone clipper we ship today has the two-screw base, so a clipper bought from us recently takes the Havoc as it comes. Key Features: Audible and tactile cutting feedback Zero-gap ready Laser marked BC22HS Two-screw mount, V2 base only Created. Designed. Owned by barbers.