Yale Cylinder Hole Recessed Lock 40 mm Axle 135 mm – Y50R-A40/B – Reversible Bolt, Headrest with Round Ends – Entrance, Service Door, Sensitive Room – White, Axe 40mm

For service door, office: cylinder lock, 1 turn lock
Reversible by turning the bolt 1/2 turn (right or left)
Domed half-turn latch to limit noise when clicking
Hinge and 1/2 steel turn for long-term durability
7 mm square, 40 mm axle, 70 mm spacing, round end headrest