Check the listing for details. Turbo Pro Sect Quarter Scale Layout Tool. Color: Blue, Condition: New. Listed at 97.18 USD. Turbo Pro Sect Quarter Scale Layout Tool A staple in any pro shop regardless of experience, the Turbo Pro Sect® is a must-have tool for precise bowling ball layouts. Key Features: Easy-to-read ruler in 1/16" increments for precise layout Integrated 180-degree protractor for indicating angle degrees Single-piece, injected molded construction for durability Intersected design for accuracy in straight and perpendicular lines The Pro Sect® is the go-to choice for professionals looking to achieve the perfect layout, especially for oval hole cuts and oval insert installation. Fine-tune Mass Bias bowling balls and those with a strong preferred spin axis for specific movement with proper alignment shift and balance hole placement. Take your game to the next level with the Turbo Pro Sect® – the tool designed for advanced layouts and precise adjustments.