JTW-1T 1 ton machine screw jack, JTW-2.5T 2.5 ton machine screw jack, JTW-5T 5 ton machine screw jack, JTW-10T 10 ton machine screw jack, JTW-15T 15 ton machine screw jack, JTW-20T 20 ton machine screw jack, JTW-25T 25 ton machine screw jack, JTW-35T 35 ton machine screw jack, JTW-50T 50 ton machine screw jack, JTW-100T 100 ton machine screw jack.