Uptech Engineering offers Ultra Magnetic Holdfast with Jack-off Screw. Uptech Engineering H&G V Block with Clamp, H&G Precision Grinding Vice & Screw Type Grinding Vice, Permanent Magnetic Chuck, Sine Table`s, Magnetic Sweeper`s, Permanent Magnetic Lifter, Roller Bearing "V" Block, Magnetic Base, Heavy Duty Electromagnetic Chuck, H & G Try-Square & Straight Edge and Electroperm Magnetic Chuck. The Ultra Magnetic Holdfast with Jack-off Screw is used for lifting, holding and locating of ferrous parts. The Ultra Magnetic Holdfast with Jack-off Screw has eye bolt for lifting. This Holdfast has a Jack-off screw which serves as a handle. This Holdfast is available in various sizes.