These horns are a great accessory for your ball jointed doll. Very versatile, with nice detail,, an no modding to your doll needed. You glue in a pair of magnets then with the extra pair of magnets, slide extra magnets under the wig to place them securely to give your doll a fantasy look. The magnets need to be about a 8mm disc size magnet (you will need 4 all together), about 5mm thick/tall should work.
Works for SD and MSD dolls. paint and have fun with them.
K&J magnetics is a great place to get magnets, magnets not included item comes blank or unpainted, variety of materials available.
also available completed with magnets on my etsy: https://www.etsy.com/shop/Silverbeam