It's simple: you just place the modesty block in the corner of two pieces you want to attach, and screw it in to each piece using the two sets of screw holes. The end result is clean and unobtrusive - doubly so if you pick a matching colour!
* PACK OF 10 or 20 PLASTIC SCREW-FIXING MODESTY BLOCKS, CHOOSE COLOUR *
WHITE MODESTY BLOCKS Furniture Connector Joint Fix-It Block Cabinet Shelf Fixing
BLACK MODESTY BLOCKS Furniture Connector Joint Fix-It Block Cabinet Shelf Fixing
GREY MODESTY BLOCKS Furniture Connector Joint Fix-It Block Cabinet Shelf Fixing
BEIGE MODESTY BLOCKS Furniture Connector Joint Fix-It Block Cabinet Shelf Fixing
Grip-Rite GR071M 2-3/8" x .113", 21-Degree Plastic Strip Round Head Framing Nails, Smooth Shank, Bright, 1M Plastic Tub (1000 Count)