SCS Direct Brick Building Base Plates - Large 10"x10" Blue Baseplates (4pcs) - Dual Side Connectivity, Tight FIt w All Brands 4 PACK BASE PLATES - 100% Tight Fit with All Major Brick Sets BOTTOM CONNECTION - Underside Connectability so you can connect Bricks from top or bottom GUARANTEED TIGHT FIT - Custom molded for Guaranteed Tight Fit PLAY TABLE - Great baseplates to build play table AFFORDABLE OPTION - An affordable alternative to your brick building collection to expand your options!