CCJH Invisible Door Locks Handle with Keys for Sliding Barn Wooden Door Furniture Hardware Ellipse Shaped(6.8"L1.77"W Black) Door Stopper and then the rail can

and then the rail can attach anywhere into the header board

1x installation instruction

Hardware kit is suitable for door thickness 30-50mm

1X Installation Manual

CCJH Invisible Door Locks Handle with Keys for Sliding Barn Wooden Door Furniture Hardware Ellipse Shaped(6.8"L1.77"W Black) Door Stopper and then the rail canBrand : CCJH ; Material: Zinc Alloy; Package Included: 1 set; Key Quantity: 3pcs; Key Material Lock Core: Brass. Dimension : L: 17. 3 cm 6. 8"; W: 4. 5 cm 1. 77"; Fit for door thickness 36 50mm; Weight: 570g 1. 26lb This door lock fit for Double Doors; Suitable for either left or right handed door. This door lock can be bolted inside or locked outside. When it is bolted inside ,it can be unlocked by key from outside.