Our 1 piece design means that the block is solid and has no joints or connections that can come apart. The internal cavity has strong rubber internal structure to provide consistent strength to the parking block. Just place in the garage area location that will notify you where you want to park. The large height of 3.25" will be felt easily. If you have a slick garage surface the blocks can be mounted permanently by using concrete anchors in the 2 provided holes in the blocks. Concrete screws not included. Our parking blocks can handle any type of weather. Rain and snow are no match for the strength and durability of our parking blocks. The blocks are also UV resistant. Rated to withstand 44,000 pounds of pressure. These blocks are very strong and will not crack or bend. We guarantee you will be 100% satisfied with this parking block purchase. If not, simply return within 30 days for a full refund.