cordless drill is an electric drill which uses rechargeable batteries. Drills are primarily used for drilling circular holes in material, or for inserting screws and other threaded fasteners into material.
Drills are also available in the impact driver configuration, high-torque tools primarily used for driving screws and tightening nuts. Impact drivers can be especially useful when driving larger fasteners or driving into harder, more dense materials.
Twist Bits - General Purpose: The tip of the bit cuts the material, while the flutes (spirals) remove the spent material from the hole and keep the bit straight. Most of the bits in the Idea Shop can be used across wood, metal, and acrylic -- be sure to adjust RPMs accordingly. When drilling into metal, be sure to use a lubricant.
Spade bits: For making through holes in wood and other soft materials.
Coutersink bits: An attachment used in conjunction with a twist drill bit, to create holes for screws or other fasteners to sit flush or inset into the material.