What's the purpose of the Hori Split Pad Pro nubs? It's preventing

Controller rotation roundup - it's hard to go back after the Forza controller's rubberized grips Valve - Retro - Tech

Hori Split Pad Pro Attachment review: I'm not attached - The Verge

Hori Nintendo Switch Split Pad Pro (Black) Ergonomic Controller for Handheld Mode - Officially Licensed By Nintendo : Everything Else

OIVO Switch Handheld Grip Controller Review

Hori Nintendo Switch Split Pad Pro (Black) Ergonomic Controller for Handheld Mode - Officially Licensed By Nintendo : Everything Else

What's the purpose of the Hori Split Pad Pro nubs? It's preventing me from attaching Switches protective case. : r/Switch

Hori Split Pad Compact Review - IGN

HORI Nintendo Switch Split Pad Pro (Sky Blue) Ergonomic Controller for Handheld Mode - Officially Licensed By Nintendo

HORI Nintendo Switch Split Pad Pro (Sky Blue) Ergonomic Controller for Handheld Mode - Officially Licensed By Nintendo

Hori Nintendo Switch Split Pad Pro (Black) Ergonomic Controller for Handheld Mode - Officially Licensed By Nintendo : Everything Else