All Latches: 8-10mm Gap Allowance
Quality Stainless Steel Lockable Side Pull Safety Latch
316 Low Carbon Stainless Steel Latch & Backing Plates
Available in Polished & Satin Finishes
Includes - Screws, Packers Friction Pressure Plate,
Protective Glazing Rubber
All Tested to AS1926.1 Swimming Pool Standard

Note, this will not suit the Master Range Gates 

Gate 

Suits 10mm holes in gate 

42mm apart

15mm in from edge

Latch panel

Doesnt need any holes.