2-way Screw Mount Base - Black - 10 pieces - Narrow and higher design for crowded surface areas. Deep cradle design provides extra support for large bundles and many components. Bases made with durable 6/6 nylon. Screw hole size is 1/4". Meets UL94V-2 flammability classification. UL recognized under file #E76766. Can be used on all standard and heavy duty ties up to 48" and 175lbs. tensile strength. Size is 5/8" x 7/8".