1. Adjustable Neck Angle: The conical maple shims are designed to change the angle of the neck bolt. These shims eliminate the unwanted gap at the base of the neck, preventing moisture buildup and wood expansion that can cause the neck to warp. Ensures a solid between the neck and body to maintain tone. 2. Gradual Taper Specifications: The 0.25° shim tapers from 0.030' to 0.019' (0.76mm to 0.48mm). The 0.5° shim tapers from 0.044' to 0.010' (1.11mm to 0.25mm). The 1° shim tapers from 0.078' to 0.010' (1.98mm to 0.25mm). 3. Versatile Adjustment: The 0.25° shim maximum versatility and stacking them allows for precise adjustment of the neck angle. The 0.5° shim is commonly used and works well on and many other bodies. The 1° shim is perfect for basses with rearmounted bridges. 4. Convenient and Timesaving: Premade conical shims cover the entire heel of the neck, saving time and effort in creating highquality shims. Ideal for quick turnover in common repairs at repair shops.