Ten-pin bowling powerful wrist position, but has the smooth timing and slide step of a stroker. Hall of Famer Pete Weber is perhaps the best-known example of a power stroker. No-thumbers and two-handers are similar in the respect that their bowling hand's thumb is not inserted into the ball. These styles create an enormous amount of hook, are difficult to master and have very few users. The thumbless one-handed style is more difficult to execute properly compared to two-handed. Generally, no-thumbers will use a less-heavier ball (usually one to three pounds lighter than their "thumb-in" ball) to make this style easier to
Ten-pin bowling if synthetic. The top of the pin shall have a uniform arc with a radius of . The USBC also has regulations governing the weight distribution of the pin from top-to-bottom. Pins are allowed one or two "voids" (holes) in the belly area (which can be viewed if the pin is cut in half from top-to-bottom). The voids are needed to balance the narrower top half of the pin with the wider bottom half. Without them, the pins would be too bottom-heavy to fall properly when struck. In addition, a standard regulation pin may lean no more than 10 degrees