IKEA BILLY Bookcase - Fixed Shelf Relocation Jig

This simple jig lets you relocate the fixed middle shelf on an IKEA BILLY bookcase — perfect if you need extra vertical space for larger items.My wife and I run a fabric store and use BILLY bookcases to display bolts of fabric. The fixed shelf in the middle made it impossible to fit three full bolts per column, so I designed this tool to match the factory shelf holes and let you move that center shelf wherever you want.It aligns using the existing peg holes and keeps everything square, so your relocated shelf still looks factory-installed.Why I Made ItWe needed a clean way to move the fixed shelf for better storage flexibility without tearing apart the bookcase. This jig solved that perfectly — it drills accurate, repeatable holes and keeps everything aligned just like the factory ones.Drilling DetailsDrill bit sizes: 5 mm (13/64") and 8 mm(5/16")Depth:5 mm hole → about 12.5 mm deep (after accounting for the jig)8 mm hole → about 15 mm deep (after accounting for the jig)💡 Tip: