Anti-slip head design: -manufactured ensures a tighter fit with the screw, preventing slippage and breakage. Strong magnetic : The bits have a strong magnetic , preventing screws from easily falling out during use. Anti-slip threads, impact- bits. Slim waist for impact cushioning: The slim waist cushions impacts during operation, preventing deformation or damage., Weight: 0.11464037624 pounds, Manufacturer: Ehwisbe