This 15" 380mm sturdy aluminum arm comes with an Industry standard AMPS Pattern drill base adapter that is (compatible with vehicle specific AMPS pattern mounts. The arm has various mounting positions available allowing you to mount what you need to the exact angle you need it mounted to. These arms work great any where you need them mounted to. They even work as great security camera arms allowing you to position your security camera at any angle you need them to positioned in. These arms with this AMPS mounting base are also great for truck drivers that need to mount their tablet holders, smartphones or any other 1/4"-20 gadgets in their semi trucks. These are also great for use in RV's, your shop, warehouse or at home on your desk if you want a permanent mount. Screws do not come with this item and need to be purchased on your own.