If you looking for one of the best sjc450 cubic screw jack manufacturers or a such supplier in China,Website:://.screwjacksj.com, equipped with one professional factory, Sijie Industrial Co.,Ltd is always at your service, we are able to offer you customized sjc450 cubic screw jack products.8: Translating screw, rotating screw, keyed screw configurations in upright or inverted mounting orientation.9. Power Source: Electric Driven,Manual Operated or Both Are Available10. Screw Type: trapezoidal screw 11: Individually or multiple screw jack lift system arrangements are available12: Precisely positioning, self-locking trapezoidal screw which supports the loads and hold position with no need to employ brake mechanism or other locking systems. SJC450 Cubic Screw Jack Drawings: