A brick with spikes

IMPORTANT: Print the bricks with line width set to 0.45. You may need to adjust flow before the bricks stay together well. If the bricks are too loose - add 1%, if they're too tight - reduce by 1%.The spikes can be very sharp. Don't actually use them to harm anyone.There are 11 different versions of the brick: 1x1, 1x2, 1x3, 1x4, 1x6, 1x8, 2x2, 2x3, 2x4, 2x6, 2x8. If you need a different size feel free to leave a comment, I will add it asap.The spikes are designed to fit under the brick above, so that they can be stacked on top of each other.