These are "Shining Adjuster Screws," featuring Swarovski crystals decorating the top of type adjuster screws. Four types of SWAROVSKI Shimmer crystals are available: * Crystal Shimmer: Transparent, Shimmer effect * Tanzanite Shimmer: Dark blue, Shimmer effect * Light Rose Shimmer: Pink, Shimmer effect * Erinite Shimmer: Light green, Shimmer effect These are Shimmer effects, introduced by Swarovski in 2018. "Shimmer" means sparkle, and the effect is a "polarized effect with a thinness that allows the base color to be seen through." It's similar to the Aurora (AB) coating, but it has a transparency that reflects the color of the base glass more. You'll feel a glamorous impression from the polarized coating on the surface. The screws are compatible with L-type adjusters for violins and violas (Wittner, Stradpet, etc.). Screw diameter: JIS M2 Made of steel (gold-colored plating), with a pointed tip. Crystal: Swarovski flatback ss20 This product includes only one screw. Adjusters, tailpieces, and instruments are not included. When replacing the screw, it is recommended to protect the instrument with a cloth or similar to prevent scratches from dropping it. Close 3 hours ago