AUXMART 48" Universal Bare-Roof Mounted Roof Rack Cross Bar Set, Aluminum Window Frame Type Roof Rack, will Fit For 4 Door Models With Naked / bare Roof Only and roof width less than 48"(refer to picture) Compatible with the T-Slot mount attachments, like Cargo Box, Snowboards and Skis Rack, Cargo Basket, Bike Rack etc. Hook on car window frames and adjustable width, no drilling/cutting required, no side rails needed. Made of premium aluminum, light weight and durable. Load capacity 150lbs when load is evenly distributed. Full Set of Roof Rack System has: a pair of cross bars, four mounting towers, three pair of mounting brackets and instructions. Made of premium aluminum, light weight and durable. Load capacity 150lbs when load is evenly distributed. Soft rubber pads on bottom to prevent damaging car paint. Hook on car window frames and adjustable width, no drilling/cutting required, no side rails needed. Come with three kinds of mounting clamps for universal fitment of different window frames. Compatible with the T-Slot mount attachments, like Cargo Box, Snowboards and Skis Rack, Cargo Basket, Bike Rack etc. Make sure your vehicle has a bare roof, without side rails and gutters. Make sure the roof width is less than 48&#034; (refer to the picture)