Aluminium screw jack with swarf protection Scraper ring protects screw jack spindle against chips. Centring hole dia. 12 mm. Spindle tempering steel, blued. Trapezoidal thread, self-locking with end stopbody. Composed of: - screw jack - Alu-base (size 10) or magnetic base (size 20). The product is available per 1 peace.