Innovative Dual-Head Design: Featuring a ball head and a T15 hole, our tool allows for flexible angle adjustments in tight spaces and expands its utility across various scenarios, enhancing functionality without increasing the cost. Fit for Aubi Systems: Specifically designed for window corner bearings, this tool set ensures a precise fit and is also ideal for adjusting window hardware, door hinges, and other fittings, covering a wide range of applications. High-Quality Steel Construction: Crafted from superior steel, our window adjustment key boasts exceptional hardness and toughness. It resists wear and deformation, ensuring long-term stability and reliability for a dependable user experience. User-Friendly Operation: Essential for window and door repairs, our tool set is ready to use right out of , helping you address various repair issues swiftly and efficiently. Comprehensive Tool Set: This kit includes two keys (ball head 4 mm, H4, T15, TT15) and one corner bearing key, providing a versatile solution for most window installation, maintenance, and repair challenges.