It is not a legitimate tool. If you want to improve at 8 Ball Pool, the only safe way is to practice your bank shots and spin control within the official app.
: The "base.apk" suffix usually indicates a raw file pulled from a device or a template used by automated malware generators. 8_Ball_Pool_cheats_Tool_base.apk
: Files labeled as "cheats" or "tools" for popular mobile games are common delivery methods for Trojan horses, spyware, and ransomware . These can steal your Google/Facebook login credentials, personal photos, and financial information [1]. It is not a legitimate tool