Amazing Drapery Hardware Plantation Shutter Repair: Anti-Sag Nail Glide BRINGS SHUTTERS BACK TO NEW/EASY DIY FIX! Nail Guides are used on the bottom of a Plantation Shutter Panel to raise it off the Sill or Frame. Over time Shutter panels can sag, these will raise the panels up into better alignment. You will receive 20 Glides .