【Combination Lock】Default code 0-0-0. The combination lock adds extra security, ensuring your tools stay safe during transport and storage. 【Durable & Heavy Duty】LOKASS backpack tool bag made from tear-resistant, puncture-proof material for long-lasting, heavy-duty use. 【Spacious & Roomy】 Dimensions of 15"L x 7"W x 17"H lokass tool backpack heavy duty provide ample storage for all your essential tools. 【Easy Tool Access】Wide-open mouth design allows quick access to frequently used tools without digging through the backpack. 【Comfortable&Breathable】Comfortable, breathable back panel and adjustable straps for extended wear. 【Multifunction Tool Backpack】Perfect for electricians backpack, engineers, and DIYers, tool backpack for men suited for both work and home projects. LOKASS Tool Backpack for Men/Women, Wide-open Tool Bag with Double-opening Metal Zipper, Waterproof Tool Carrier with Combination Lock, Gift for Eelectrician/Engineer-Large (Black/Orange）