Kreg KFS-PUCK blocks are good helpers for any project. Four hexagonal blocks that can be used for just about anything. Each can hold up to 200 pounds. These blocks are true transformers. They will be indispensable when you need to paint, sand, and clamp something. GripMaxx technology ensures that the blocks won't slip on the surface. The 1-1/2 inch height is perfect for working with regular 2x4s boards. If you love to do things with your hands or just want a versatile tool on hand, these Kreg blocks are definitely for you.