1.100% High quality and Brand new.
2.Easy to use and install.
3.Conveniently, safely & quickly.
4.Easily locks onto and releases drill bits.
5.Allows hex drive power tools to use conventional drill bits.
[Name]: 0.3-3.6mm Mini Keyless Drill Chuck Electric Grinder Adapter
[Material]: Carbon Steel
[Support rate]: 0.3-3.6mm
[Surface treatment]: Nitriding black
[Handle]: About 2.35mm Round handle OR About 3mm Round handle
[Package included]:1 xElectric Drill Chuck
[Package]: Packed Safely in Bubble Bag
Adjust the speed of the first governor to the lowest or zero turn, And then turn on the power to adjust speed, but speed is not too high . Best not to over 10,000 rpm, otherwise it will cause the rear axle bent.