One unique feature of the candlepin sport is that fallen pins, called wood, are "not" removed from the pin deck area between balls, unlike either the tenpin or duckpin bowling sports. The bowler, according to the rules of the sport—before delivering the second or third ball of a box—must also wait until all of the wood on the deck comes to a rest. Depending on where the fallen pins are located on the pindeck and their angle(s) after all movement of them ceases, the wood can be a major help, or obstacle—partly due to the ball having nearly the same weight as one candlepin—in trying to knock down every single standing pin for either a spare or "ten-box" score in completing a round.