This bowling ball ships UNDRILLED with no holes unless you add drilling services. Brunswick is excited to introduce the Twist, a new entry performance series that bridges the gap between TZones and Rhinos. Brunswick has a new Twist on ball reaction. We have combined our proven R-16 Reactive with the new Twist Low Diff core to create easy length with a strong and controllable backend reaction on drier lane conditions. Available in 4 vibrant colors and weights 8 through 16 pounds, the Twist is sure to appeal to bowlers of all ages and skill levels. The Twist's proven cover and performance core combination at a new low price point will be an instant winner for newer bowlers and a great upgrade from plastic balls. Coverstock: R-16 Core Design: Twist Low Diff Core Shapes: Please see pics. There are different core shapes for 8lb balls, 9-11lb balls and 12-16lb balls Finish: 500 Siaair/Crown Factory Compound/Crown Factory Polish Weights: 8 -16 lbs Hook: 80 Length: 190