Versatile adjustable wrench: fits a wide range of screws and nuts, making it useful for both DIYers and professional mechanics. Designed to handle common fastening tasks with one tool. Oil filter removal tool: works for removing and installing oil filters of various sizes, a practical addition to any mechanic’s or home garage toolbox. Water filter key: compact and lightweight for easy handling when replacing or servicing water filters under sinks or in tight spaces. Band-wrench design: flexible strap/band style adapts to irregular shapes and non-standard housings, improving grip on round or smooth filter canisters. Adjustable bottle-opener function: adds multi-function utility for specific cap or lid types, expanding the tool’s range of applications. Compact and portable: small, lightweight design fits in toolboxes and can be carried to jobsites for on-the-go repairs and maintenance. Practical and reliable: combines multiple functions into one tool to reduce the number of items needed in a toolbox and simplify routine maintenance. Typical applications: Automotive maintenance: remove and install oil filters during oil changes, or use as a general adjustable wrench for nuts and bolts. Home plumbing and water filtration: loosen or tighten water filter housings and service under-sink filter cartridges in tight spaces. General repair and maintenance: use for varied fastening tasks around the house, workshop, or jobsite where an adjustable, compact tool is needed. What you get: A multifunctional, adjustable tool that covers screw and nut fastening, oil filter removal, water filter servicing, band-wrench applications, and an added bottle-opener feature — all in a compact, easy-to-carry format.