The Kelpro Sump Plug and washer range includes many different styles. - Standard Type Sump Plugs - Oversize Sump Plugs for use when existing threads are stripped or damaged - Guide Point Sump Plugs used for alignment and to help reduce cross-threading - Piggy Back Sump Plugs (oversized but have a main plug that is installed into the old thread and the oil is drained through the smaller secondary plug) - Magnetic Sump Plugs (used to remove foreign metal particles that circulate through the lubrication system).