Engineered to hold 33u amplifier in 18' standard depth 3.5' diameter durable and noiseless casters for ease of transportation Removable front & rear covers by centre parting design for simplified lifting & use Heavy duty pre-tapped rack rails with mounting hardware Industrial grade recessed spring loaded split dish butterfly closure latches with padlock tab with a shackle opening of about 7mm. Heavy duty ball corners with stacking dimple on bottom side allows for centering and stability when stacking multiple units. Ata-300 style durable transport case is a heavy duty professional style with industry recognized impact standards ideal for safe travel. Well riveted heavy duty double edge tongue and groove impact resistant aluminum frame