not for use if you have flat nail beds [SEP] these were not that great for me i think it is because my nail beds are a little flatter than usual but i have had no problems with other dual forms these made the nail super thick in the middle from cuticle to tip almost a ridge nail but super thin on the sides i tried adding acrylic to the sidewalls but it still did not work well the sides cracked and broke while filing i knew they were going to be straight nails but i was not expecting them to curve up like a slight ski jump i cannot recommend these