This Keystone holder is perfect for direct installations in wood constructions, plastic constructions or for panel mounts with a distance between the holes of approx. 28.9mm. You can then install 1 keystone of your choice. · For 1 keystone module · Dimensions (ca.): 35.7 x 19.15 x 9.9mm · Cutout dimensions (ca.): 23 x 16.7 x 7mm · Distance between holes (ca.): 28.9mm · Incl. 2 screws · Material: metal · Color: silver