An unusual adaptation for hook here. Rectangular structural members are punched to permit Hook use. There is just enough front face to give the hook Backplates purchase. The top holes are elongated to allow the Backplate Lugs to be inserted from beneath, then rotated forward. CLICK the thumbnail for a broader view. Hooks are Two-Piece Straight-Entry Scan Hooks with Metal Backplates.

For all unusual hole patterns and surfaces see…
Expanded Metal Hosts Flatback Hooks
Perforated Metal Creates Bin
Custom Perfed Gift Card Display
Kee Klamp Frame for Perfed Metal
Wide vs Narrow Attached-Back Hooks”
Countersunk Perfed Metal Display Surface
Morse Code Dot-and-Dash Hook Spacing
One-of-a-Kind Perfed Metal Pattern
Structural Member Accepts Hooks
Expanded Metal as Display Surface
Articulated Metal Tag for Labels
Diagonal Grid with Custom Hook
Hook Styles for Square Perfed Metal
Slatwall Squares as Wall Pattern
Hybrid Perforated Metal Hook
V-Hook vs. Flat Back Hook
Perforated Pallet Rack Overlay
Hanging Tube Self-Sells” (This Post)
Poor Display, Outstanding Fixtures
Inventory Control Front and Rear
Square-Slot Multi-Hook for Socks
Micro-Slot Shoe Ledge
Shoe Ledge Clings to Metal Mesh
Fitflop – Store Fixture or Decor?

For a visual Pinterest Board summary see…
Display Surfaces Styles Across Retail

To focus on square-holed implementations see…
Square Perforated Metal, Riveted Hook
Loop Hook for Square Hole
Hook Styles for Square Perfed Metal

For related “extender“ concepts to add space see…
Traditional Pegboard Extender
Modern Pegboard Extender
Wire Basket Extender
Overhead Hook Merchandising
Pegboard Extender Naked
Periscope Hooks Expand Display

Also browse shelf edge extenders at…
Single Item Shelf-Edge Extender
Shelf Extender is Bottom Mount
Shelf Edge Shoe Extension

For a Pinterest Board photo summaries see…
Extenders: Vertical Surface Display
Extenders: Horizontal Shelf Edge Display

For a range of Straight-Entry applications see…
Four-Lug Hook for Straight Entry
Category Definition Via Foamcore
Structural Member Accepts Hooks
Hybrid Grid Hook Now For Pegboard Too
Hook Slips Straight Into Slots
Straight-Entry All Wire Dividers
Tight Planogram Design by Matell
Straight-Entry Island Spinner
Plug-in And Straight-Entry Utility Hooks Combine
Slot Bar Mounted Over Slot Wall
Best Pegboard Straight-Entry Backscratcher
Label + Card = Custom Back Tag on Straight-Entry Loop Hook
Faux Slatwall, Genuine Straight-Entry Hooks
Lengthy Straight-Entry Hook
Hinged Straight-Entry Hook
Straight-Entry Grid Hook Innovates
Inventory Control Front and Rear
Straight-Entry Hook Marquees Items
Periscope Straight Entry Hooks Expand Display
Angled Straight-Entry Scan Hook
Fixture Faces Aisle Traffic Diagonally
Countersunk Perfed Metal Display Surface
Sign on a Stick.”

For “with” vs “without” Straight Entry Hook use see…
Straight-Entry Under-Shelf Hook
Polish Crew Fixtures the Impossible

For poor straight entry applications see…
Love the Hook, Not the Use
Odd Straight Entry and Bar Combo