|Artwork of a Screw Bomber from Mega Man 1|
Screw Bomber (or "Screw Driver", depending on localization) is an enemy from Mega Man 1, introduced in the initial release of Mega Man Maker. It is a small screw-shaped enemy that can be placed on either the top or the bottom of a block. It will only activate once the player is within its range (about 6 blocks), at which point it will extend and fire two volleys of five shots in a semi-circle around it.
They are also weak to Rolling Cutter, Fire Storm and Thunder Beam, weapons that despite their power can destroy them in one fell swoop.