The Schlegel patio door lock has a pin which depresses when it hits the strikeplate allowing the handle lever to be lifted to engage the locking points. It is stamped with 2 letters which represent backset size and the keep is sold separately.
Name Schlegel Patio Door Lock SKU SCHLEGEL Brand Schlegel Multipoint Operation Lift Lever Centres 40mm Spindle Size 8mm Case Height 207mm
SCHLEGEL15 £46.00  (0 In stock)
Schlegel Patio Door Lock MA 15.5mm
16mm- 0.4 Kg
SCHLEGEL18 £53.00  (0 In stock)
Schlegel Patio Door Lock MB 18.5mm
19mm- 0.6 Kg