Adjustable, self-aligning V-blocks with integral spirit level makes zeroing your scope faster and far more accurate. Enhances final scope accuracy by squaring the crosshairs to the bore. Even a slight cant of the crosshairs can reduce overall accuracy, change point of impact and increase the likelihood of missed 'bulls' or wounded game. SPECS: Aluminum, anodized finish, black. 5-1/2' (14cm) long,
2' (5cm) wide. Includes complete instructions.