Half-Placement is a glitch and advanced building technique in which the user is able to place blocks offset half a block away from the normal block placement "grid". This is done by using wheels, which have a width of 0.5 blocks, to offset blocks placed on them. Because of the use of wheels, Half-Spacing is also known as "Wheel-Spacing".
Half-Placement has a wide variety of uses, allowing for connections not previously possible. To the right is an example of a previously impossible feat made possible through half-placement.
Half-Placement can also be applied with steering hinges to create double-jointing.