Diamond Sharpeners Chainsaw 12 volt chainsaw sharpening kit. Designed for cigarette lighter or battery terminals. Precision guide for efficient sharpening. 3 Chainsaw sharpeners with guide included: 5/32, 3/16, 7/32 Motor Miniature drill motor Charger Unique combination connection for use in the car through lighter plug & the poles of the battery Handy Finger Tip Switch