Heavy-duty, 5-lever Kitemarked sash lock, meeting British Standard insurance ratings. Compatible with our unsprung knob sets or 57mm center unsprung lever lock handles. Features a robust spring for reliable operation of heavy components. Matching rebate kit available (product code 90054). Recommended for use with a 3" sash lock and our knob sets. 'Keyed Alike' for single-key operation of multiple cylinders. Includes matching stainless steel wood screws.