HKS x TONE 10mm Ratchet Keychain SetHKS x TONE 10mm Ratchet Keychain Set Collaboration between HKS and TONE Fully functional 10mm ratchet wrench Socket and adapter included Made in Japan HKS part no. 51007 AK329 The HKS x TONE Ratchet Key Chain Set 2021 is a special collaboration item combining HKS's performance heritage with TONEs precision tool engineering. Designed as a functional 10mm ratchet wrench, it includes a matching socket and adapter, making it both a collectible accessory