No screw drivers or socket wrench is needed any more! Just simply turn the key clockwise to tighen and counter clockwise to loosen. Bandwidth is 12mm. Works for both indoor or outdoor use. 【HIGH QUALITY】Made of high quality stainless steel with high performance of corrosion resistance and acid resistance, they are strong and durable, when installing on the pipe, you will no longer worry about them rusting and breaking.
eBay