FurnitureParts.com IKEA Billy Shelf Pins #131372 (12 Pack)
IKEA Billy Bookcase Shelf Pins 131372 Support Pegs Fixings BRAND NEW SET X 4 | eBay
IKEA 121762 BILLY SHELF SUPPORTS PINS FIXINGS BRACKETS REPLACEMENT SPARE PART X4 | eBay
The Best Way to Fill Billy Bookcase Holes
Ikea Kallax Hack: Add a Shelving Unit for Cheap! - Leap of Faith Crafting
IKEA BILLY SHELF SUPPORTS PINS FIXINGS GENUINE REPLACEMENT SPARE PARTS 131372 | eBay
Adding extra shelves to the Ikea Detolf display cabinet | Igor Kromin
Can you drill extra peg holes into a billy bookcase? Or would it be better to use like nails or screws or something else? The shelves need to be in really specific
Shelf Brackets for IKEA DETOLF Add Extra Shelves - Etsy UK