Electric Nail File & Nail Drills(SD-10) SD-10 electric nail file is made for professional nail technicians. we are proud of our high quality products with following features: 1) Excellent design. 2) Have 8 selections to change speed controlled by computer. 3) Automatically Pop-up handpiece function. 4) Supply circuit: 110/220/240V 50-60Hz. 5) Extra quiet during operation. 6) Maximum rotation speed 30,000 r.p.m. 7) Compact sized control box for salon table. 8) Handpiece is easy to change bits. 9) Compact and stainless steel handpiece. 10) Available forward and reverse switch. 11) Foot on/off switch system. 12) Available 2.35mm bits. Standard configuration: 1) 1 control. 2) 1 handpiece. 3) 5 bits,4 sanding bands,1 mandrel. 4) 1 foot pedal. 5) 1 instruction.