Reliability: Proper placement of bow components helps maintain bow performance. Quality Materials: T-square ruler is made of aluminum alloy; nocking pliers are made of stainless steel; string nocking points are made of brass. T-square ruler features epoxy-coated finish for scratch resistance and includes dual measurement scales (mm and inches). Nocking pliers feature spring-loaded design and smooth jaw opening for easy use. Eight nocking points included; inner layer features non-slip nylon for secure bowstring protection and positioning. Versatile Use: This kit measures brace height, sets nocking point position, and supports common bow and arrow setup configurations. Specifications: Material: Metal Dimensions: 12.9 x 3.46 inches; 2.63 x 1.1 inches; 2.67 x 1.4 inches Color: Black Package Includes: 1 x T-shaped bow square, 1 x nocking pliers, 8 x bowstring nocks Note: Color may vary slightly due to screen settings and lighting. Measurement tolerance: ±1–3 cm.