This durable aluminum Single Railblock gives you the ability to quickly and easily mount any 1/4-20 accessory to any single 15mm rod. Due to its built in quick-release mechanism, you no longer have to detach accessories from your kit. In a literal snap, you have the ability to mount and remove your DSLR Gear. This is an excellent affordable mounting solution that will work great with any 1/4 - 20 accessory.