Proprietary Screw Wrench option:1 piece 4inch)Warm tips: if you are

4inch)Warm tips: if you are not very sure about the base ring size or want to try one more different size of base ring

you can upload picture to make your customization more precise

then you have 2 pieces of different size of base ring with 1 cage

If you need further security for your device

(about dimension unit conversion：1cm=10mm=0

Proprietary Screw Wrench option:1 piece 4inch)Warm tips: if you areBased on 100% security requirements,BAWR three holes screw comes out, you won't find a wrench or tool anywhere else that works for "BAWR" three hole screw. The wrench material has been upgraded to a hardness of up to 58HRC. The three pins at the end is more tough and strong to avoid easy break cause by excessive torque. Please feel free to use. This wrench are not for external sale, if you are not a customer who has purchased the equipment applied