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Feature:
Made of high-strength S2 alloy steel, these screwdriver bits are very durable.
Screwdriver bits has strong magnetism and would attract screws and hold screws firmly.
These screwdriver bits have a collar that acts as a stop, preventing the bit from following the screw head into the drywall--once the collar contacts the drywall skin, the bit cannot proceed any further.
With 1/4inch hex shank, they are widely used on many power drills or cordless drills.
Using these screwdriver bits, drywall screw head will stretch and dimple the drywall skin, but not ruptured it.
