product features: Fully automatic hydraulic design-automatically up and down, grip and pull. Made of alloy steel with super-high strength; double-acting hydraulic design. Used for dismantling large shafts and perforating work pieces. Available in 2 and 3 jaws design allows adding a pulling disc to pull bearings. Roller cart makes it available to change workplace. Want to know the size you need? Come visit our website now https://www.atwwren.com/products/REDUCER_Insert.html Or contact us Tel: +86 571 8811 5720 Fax: 0571-88110210 Postcode: 311100 E-mail:info@wrenchina.com Company Name: Hang Zhou WREN Hydraulic Equipment Manufacturing Co., Ltd. Address: No. 24, Xingxing Road, Linping, Hang Zhou, China