Are you looking for a durable and long-lasting insulator? Look no further; the American Farm Works Small Ceramic Lag Screw Insulator is made of porcelain, an extremely strong type of ceramic. So strong that it can be expected to last the lifetime of the fence. To install, simply screw the electric fence insulator into a pre-drilled hole in your wooden post and slide your fence line through the insulator. This small ceramic lag screw insulator works with traditional fence wire, high-tensile fencing, polywire, polyrope, and polytape up to 1 in. Use this electric fence post insulator to ensure that the fence wire stays electrified and away from touching posts that would absorb and mute the electricity.