Reliability: Positioning the bow components correctly helps archers maintain consistent performance of the bow. Quality Materials: The T-square ruler is constructed from aluminum alloy, the nocking pliers from stainless steel, and the string nocking points from brass. Enhanced Design: The T-square ruler features an epoxy-coated surface for scratch resistance and includes dual measurement scales in millimeters and inches. The nocking pliers are designed with a spring mechanism and smooth jaw opening for ease of use. The set includes 8 brass nocking points with an anti-slip nylon lining to securely hold and protect the bowstring. Versatile Use: This kit allows for accurate measurement of brace height, precise placement of nocking points, and supports standard bow configurations for tuning and adjustment. Specifications: Material: Metal Size: 12.9 x 3.46 inches; 2.63 x 1.1 inches / 2.67 x 1.4 inches Color: Black Package Contents: 1 x T-shaped bow square 1 x Nocking pliers 8 x Bowstring nocks