15000 9w usb professional electric manicure tools pedicure mini portable pen shape electric nail drill bit set cuticle bit ceramic, Silver

feature : press button to lock shaft, use the collet wrench to loosen the collet nut. insert the bit, and tighten the collet securely, but avoid over tightening the collet nut and never use the damaged bit. there is an off/on switch. when the switch is on, the tool runs at a lower speed in the beginning, slide the switch to find the speed needed from 3,000 to 20,000rpm. slide the switch towards off for complete s when finished, turn off the tool and unplug it.