Impact Dog Crate's Best Warranty - Backed by Impact Dog Crate's 10-Year manufacturer dog damage warranty. Zinc Steel Paddle Latch - Zinc-plated steel paddle latch which provides a robust mechanism for added security against the toughest escape attempts. This latch mechanism is designed to withstand high-stress forces. Four Additional Butterfly Latches - It features four additional butterfly latches, providing maximum strength and security. These latches are easy to operate and provide an added level of protection. Small Circle Ventilation Holes - The small circle ventilation holes, measuring at 0.05 inches, are specifically designed to prevent dogs from getting their K9 teeth in and potentially harming themselves. These ventilation holes provide adequate air flow while ensuring your pet's safety. Over 62% Thicker Aluminum - Constructed with 62% thicker aluminum alloy. The thicker aluminum material increases the structural integrity of the crate, ensuring that it remains stable and secure under pressure. Stackable Like Sizes - Their design allows you to stack similar sizes on top of each other to make the most of whatever space you’re working with. Talk about an innovative way to help save room. Military Grade Handles - These military grade handles allow for not only easy portability but also for a strength that can take on the toughest of scenarios.