When drilling into metal, you may add a few drops of cutting oil into the drilling area. This will help to reduce heat, improve performance and extend the life of the bit. If you are drilling into wood or plastic an oil is not necessary.
Bosch High-Speed Steel Impact Tough Turbo Step Drill Bit Set — 3-Piece, Model# IMSDC003

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- Cordless step drill bit design – made for smooth drilling in cordless drills using high-speed and low-speed mode, with 2X cutting edges and optimized angles on the bit steps
- Hex shank impact-ready step drill bit – optimized for impact drivers, and the bits are drill/driver compatible
- 2X cutting edges – provides 2X faster cutting through tough material, with two sharp edges
- 2X longer life and clean holes – designed for burr-free holes, these bits help manage heat for longer bit life
- 2X holes per charge – features efficient operation to boost user productivity
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