Given the creativity of human beings one can expect every possible combination of design elements to be tried. Here a normally Pegboard- and Slatwall-mount Anti-Theft Hook is found in a crossover application on slotted backbar. How secure is it? I did not test. But there has been at least one comment on this style of locking hook before. See the baseline anti-theft posts immediately below..

For more on this Bar Fixture SEE…
Slotted Bar Mounts on Slot Wall

For anti-theft basics SEE…
Baseline Anti-Theft Hook
Anti-Theft Fixture Failure.”
Baseline Anti-Sweep Hook
Rack Meters Items One at a Time
Pick Cards on Common Display Hooks
Universal Pick Card Holder

For designer security fixtures SEE…
Prada Anti Theft Hook
Fendi Finial as Branding and Anti-Theft
Designer Belts on Lockdown
Designer Anti Sweep Hooks

For noteworthy mainstream anti-theft SEE…
Locking Wall Fixture for Guitars
Diminutive Anti-Sweep Hook
Disk Offers Anti-Sweep Potential
Locking Security Cart in Jewelry
Radical Wrap-back Security Hook
Call Button Cuts Retail Theft?

For less appropriate anti-theft uses SEE…
Double Locking Theft Protection
Display Shouts ‘Don’t Buy
Anti Planogram Anti Theft Hook
Land Mines As Retail Anti-Theft?
Double Locking Theft Protection
Caged Maximun Security for Hooks

For outright anti-theft humor SEE…
Zip Tie Security Hooks
Anti-Theft Window Dressing
Anti-Amenity: Don’t Trespass or Sit Here
Homemade Anti-Sweep Hook

For all posts in this category SELECT
Anti Theft / Security Fixtures” from the Categories Menu

For interesting slot and slotwall posts see…
Slot Board vs Pegboard
Re-thinking Hook Design for Slots
Squared-Slot Jewelry Display
Slotted Panel Has Rear Recess
Slot Wall With Custom Fixtures
Slotwall and Label Strip Both Curve
Slot Bar Mounted Over Slotwall
Slotted Bar a Fashion Trend
A Season for All-Wire Slot Hooks
Squared-Slot Multi-Hook for Socks
Hooks Slip Straight Into Slots
Hook Saddle Mounts Slots Not Bar
Socks, Slots, Slats and J-Hooks”
Corrugated Display Sports Slots
Slot Mount vs Hole Mount Hook
Slot Mount Rectangular Bar Arms
Slotted Upright Uses Slatwall Hooks
Single Prong Slotwall Bra Display
Micro Slot Shoe Ledge
Micro Slot Hook for Jewelry
Slotted Faux Surface
Shoe Ledge Clings to Metal Mesh
Hat Ledge for Slot
Branded Slot-Mount Hat Tray.”
Anti-Theft Hook Used on Slotwall
Freestanding Slot Tower Concept
2011 World’s Smallest Slotwall Display Award

SEARCH “Crossover” to see fixtures designed for one purpose
and used for another like this Pegboard/Slatwall crossover to Slot..