1850 Series: Double Cylinder|The 1850 series Euro profile cylinder fits all standard European profile cylinder mortise locks.|These cylinders are less well finished than the 1500 series but are functionally reliable.|They are aimed at the budget "first fit" market.|Quality solid brass body and plug 30 degree offset cam inhibits knock through High quality 5 pin tumbler mechanism Anti pick drivers Anti drill pins Anti pick key profile Large range of key combinations 3 brass keys, nickel plated Available in polished brass (PB) or satin chrome (SCP) Available keyed to differ or keyed alike