As a perfectionist with my nails I couldn’t do dip without an efile. I just can’t get it smooth enough manually. That’s just my personal preference. I got one 3 years ago on Amazon and it’s still going strong

Belle Electric Nail Drill, 30000 RPM Compact Efile Electrical Professional Nail File Kit for Acrylic, Gel Nails, Manicure Pedicure Polishing Shape Tools Design for Home Salon Use https://www.amazon.com/dp/B07ZCHTDMS/ref=cm_sw_r_cp_api_i_AY85K4JABFY137B2GMFT