Ten-pin bowling ramp in which a bowler will use two hands and push the ball down the ramp onto the lane. There are three widely recognized delivery styles used while the ball is released onto the lane. (See article: Bowling form.) These are the "stroker", "cranker" and "tweener" styles. Lesser used (and newer) styles include "no-thumb" and "two-handed". Strokers often keep their shoulders square to the foul line and their backswing generally does not go much above parallel to the ground. This type of delivery reduces the ball's rate of revolution, thus decreasing its hook potential and hitting power. Strokers rely on
Five-pin bowling bowlers use a number of terms to denote the results of a throw: All modern bowling centres use automated pin-setting machines (first used in 1957) to reset the pins after each ball is thrown. In five-pin, two types of pinsetters are used—"string" and "free fall". The "string" pinsetter is known for each pin having a string attached to the head. These pinsetters were first invented in 1963 and are characterized by a string being attached to the head of each pin. This type of pinsetter has a low operating cost, so it is the most commonly used type of pinsetter.