The other one is on a Land Rover discover 4 with roof bars, this clamp on.
eBay
Radio Head Unit Installation Frame Universal For 2Din Car DVD Radio Player Auto Panel Audio Dash Mount Kit Box 2Din Fittings Kit
Aliexpress UK
Insert the pipe and lock it directly with the U-bolt and crossbar. Put on the spring washers and fasten with nuts, then you're done. Suitable for luggage racks up to 40mm thick. You can lock the tensioner from the top or bottom.
eBay
Radio Head Unit Installation Frame Universal For 2Din Car DVD Radio Player Auto Panel Audio Dash Mount Kit Box 2Din Fittings Kit
Aliexpress UK
【Easy Installation】No drilling or welding required—simply fasten with standard nuts for quick setup without modifying your vehicle or roof rack. We'd like to settle any problem in a friendly manner. It's just take you 1 minute.
eBay
Radio Head Unit Installation Frame Auto Panel Audio Dash Mount Kit Box Universal 2Din Fittings Kit For 2Din Car DVD Radio Player
Aliexpress UK
Can be used on roof rack rails up to 40mm thick. Fits most roof boxes on the market. - 4 x Stainless steel (316) U bolts. Material: Made of quality stainless steel (316).
eBay
Radio Head Unit Installation Frame Universal For 2Din Car DVD Radio Player Auto Panel Audio Dash Mount Kit Box 2Din Fittings Kit
Aliexpress UK
4x Stainless Steel Universal Roof Box Car Van Mounting Fitting Kit U-Bolts Clamp. Can be used on roof rack rails up to 40mm thick. Fits most roof boxes on the market. 4 Pcs Stainless steel U bolts. 4 Pcs Rubber washers.
eBay
Auto Panel Audio Dash Mount Kit Box 2Din Fittings Kit Universal Radio Head Unit Installation Frame For 2Din Car DVD Radio Player
Aliexpress UK
4x Stainless Steel Universal Roof Box Car Van Mounting Fitting Kit U-Bolts Clamp. Can be used on roof rack rails up to 40mm thick. Fits most roof boxes on the market. Material: stainless steel. 4 Pcs Stainless steel U bolts.
eBay
Portable Plastic 75/95/130L Car Roof Top Box Rotomold Tool Rugged Case XXL Roof Rack Cargo Storage Boxes for Camping & Hiking
Aliexpress UK
It's just take you 1 minute. 【Easy Installation】No drilling or welding required—simply fasten with standard nuts for quick setup without modifying your vehicle or roof rack. We'd like to settle any problem in a friendly manner.
eBay
Mounting Bag FastClick 2/4PCS Roof Box Quick Installation Clamp Fixing Clamp Universal FastGrip Car Roof Box Accessories
Aliexpress UK
【Easy Installation】No drilling or welding required—simply fasten with standard nuts for quick setup without modifying your vehicle or roof rack. We'd like to settle any problem in a friendly manner. It's just take you 1 minute.
eBay
2 PCS Caravan Van Roof Rack Mount Kit,Camper Van Motorhome Roof Rail Mounting Brackets for Solar Panel or Roof Rack
Aliexpress UK