From The Anvil 52644 Aged Brass 45/45 5pin Euro Cylinder/Thumbturn KA

Suitable for use with our Euro or espag. lock handles, and in conjunction with a Euro sash or multi-point lock.\n--A standard 5 pin Euro cylinder.\n--Tested to BS1303 and is \""Anti Pick\"", \""Anti Snap\"", and \""Anti Bump\"".\n--Product is supplied with 3 keys and is 'Keyed Alike', meaning more than one cylinder can be operated with the same key.\n--Our range of Euro profile thumbturn cylinders require keyed access from outside, but have a thumbturn on the interior, meaning no key is required to lock the door from inside.\nThese euro cylinders are manufactured from solid brass and coated with a high-quality plated finish to perfectly match our Aged Brass ironmongery.\n\nPlease avoid using \uFFFDBrasso\uFFFD (73102) or any other cleaning products on this finish, as this may affect the lacquer. Oiling of all moving parts using our \uFFFD3-in-1 Oil\uFFFD (92337) is beneficial to the longevity of your products. This process is also highly recommended during initial installation. An oily clom