1. Rustproof and smooth operation The rails feature a blue sealed electroplated surface for rust resistance. Inside, industrial grade double ball bearings ensure the drawer glides smoothly even under heavy loads. The drawer also uses wear-resistant and impact-resistant rubber anti-collision pads to glide quietly without noise. 2. Full extension for easy access Triple full extension allows the drawer to be pulled out completely, exposing the full contents. Two rows of solid steel balls are embedded in the drawer slide, providing smooth operation even when the drawer is fully loaded, making it easy to open and reach items. 3. High load capacity and durability The drawer rail is made from dense, high-strength cold-rolled industrial steel and industrial solid steel balls. After multiple push-pull tests, it maintains its shape under full load. Maximum load capacity is 150 lbs / 68 kg, delivering a long service life. 4. Safety lock function Locking rails enhance safety by preventing accidental shifting. To unlock, press the black handle. Note: the lock engages only when the drawer is fully closed and fully extended. Applications and use scenarios - Caravan or motorhome kitchens and storage: provides a secure, smooth, full-extension drawer that can carry heavy items while traveling, with a locking option to prevent shifting during transit. - Workshop or garage tool storage: supports heavy tooling and parts with quiet operation and reliable full access to all contents. - Utility vehicles and trailers: suitable for heavy, high-demand drawers in cargo settings where rust resistance and long service life are important.