Set of 3: 0.2mm, 0.5mm, 1.0mm Neck Shims, Brass Made. An alternative to StewMac Neck Shims! This is an assortment set of 3. Please note that the joint plate is shown for size reference and is not included. You can refer to the latter half for preliminary knowledge, but those with experience often choose to insert metal shims like telecards during setup. In this regard, brass is one of the best metals for vibration transmission. With screw holes, it's very convenient because it doesn't slip even when the guitar is stood up while applying torque to the neck joint. Credit cards tend to fall apart, which is a hassle. If the joint shape is not standard, this type of bar-shaped shim may be the only option. The thicknesses available are 0.2mm, 0.5mm, and 1mm. Reference values for height difference and angle change in standard neck joints are: 0.2mm = 0.23° 0.3mm = 0.34° ← When 0.5mm and 0.2mm are combined 0.5mm = 0.56° 0.7mm = 0.8° ← When 0.5mm and 0.2mm are combined 0.8mm = 0.9° ← When 1mm and 0.2mm are combined 1.0mm = 1.13° To be honest, for the average person, the angle can change depending on how tightly it's tightened, so you can be approximate in your selection, but the sound quality of the guitar also changes significantly depending on the saddle height (distance from the body to the string's pivot point). Before adjusting, it's a good idea to find the ideal sounding height and then decide on the neck angle based on the saddle setting. I insert shims not only on the neck end side but also on the headstock side. I did this after reading an article by Ken Smith, and rather than gluing wood together on the headstock side, if you're going to insert hardwood, it seems that having a completely unified material and separating it properly gives a clearer separation and a better high-frequency response. (In his case, he inserts ebony into the heel of through-neck guitars.) Also, by doing this, the range of height settings for the saddle section expands even with the same degree of angle change. Please give it a try. Color: Gold系 (Gold-toned)