A draining tool useful for controlled draining of a fluid container, such as a threaded spin-on type oil filter. The draining tool includes a piercing pin having a tapered point, striking head, resilient spring, resilient spring retainer assembly, and piercing pin retainer assembly. The draining tool includes a central block having an axial bore housing the piercing pin, and an internal chamber having a channel permitting drainage of fluid from the internal chamber. One end of the central block provides an attachment assembly suitable for holding the tool against the fluid container allowing the fluid container to be pierced by the piercing pin and the internal chamber to receive fluid flowing from the fluid container.