The Wicked "Cross" board & quad tool was developed especially for roller skating and skateboarding. This multi-functional tool can be used for nuts with either 9.5mm (truck to board nuts), 13mm (wheel nuts), or 14mm (truck kingpin nut). The tool includes a bearing puller. A special gadget is the integrated bottle opener. This cool and handy-sized tool should always accompany you at your skate sessions.