【Large Capacity Design】This heavy-duty tool backpack features a spacious 34×22×52cm design with a large storage capacity, including 30 multi-purpose pockets for efficient tool organization. The smart full-open layout allows easy access to hand tools, power tool accessories, testers, screwdrivers, pliers, and repair equipment. Equipped with durable compartments, front zippered storage sections, and side pockets, this professional tool rucksack keeps your tools secure, organized, and within quick reach on any job site. The included parts kit provides additional storage for screws, drill bits, connectors, and small accessories. 【Thoughtful Design】The full-open design with dual smooth zippers allows quick, easy access to the heavy-duty tool backpack, effectively doubling access speed. Reflective strips enhance safety during use, while the included double-layer zipper pouch provides organized storage for small precision parts. 【Durable Structure】Constructed from 600D fabric with reinforced stitching and four rubber feet, the PROSTOR tool backpack minimizes wear and helps protect tools from moisture-related rust, extending their lifespan. Its improved design increases vertical stability by 60%, making the electrician tool backpack well-suited for everyday use on construction sites. 【Comfortable Carrying Design】Thick, wide adjustable shoulder straps keep the electrician tool backpack close to the body, allowing greater mobility even when fully loaded. The waist support pad helps reduce pressure on the shoulders and lower back caused by heavy tools, ensuring comfort during extended use. 【Ideal Choice】Measuring 46 cm (L) × 40 cm (W) × 18 cm (H), this heavy-duty backpack is designed for electricians, plumbers, construction workers, and anyone who requires reliable, organized tool storage.