Ring screw-in insulator for wire rope and polytape up to 1/2 in. Width. The threads are of a new improved design that allows the insulator to cut the wood thus preventing the splitting of wood. This makes the installation of the insulator much easierFeatures Improved threads allow for better wood penetration Ring design enables wire to be inserted with one easy twist Insulator Material - High Density Polyethylene Attachment Position - Front or Back Attachment Method - Built in screw Insulator Conductor Type - Polyrope Polywire Wire up to 3/8 in. Fence Post Type - Wood Primary Color - White Dimension - 5 x 8 x 2 in. Item Weight - 1.2 lbs. - SKU: FMSP104