Made of premium S2 alloy steel which is tougher than normal metal, high strength and toughness maximizes service life.        
Precision machined Philips tips fit into screws firmly, effectively prevents bits from slipping or shuttering, advanced heat treatment and abrasive blasting treatment on the surface of the bits.        
Compatible with manual screwdriver, T-handle screwdriver, impact driver.        
Includes 50 Phillips #2 (PH2) bits, providing a full supply for various fastening tasks without frequent replacements.        
Used for drywall projects, home DIY projects, mechanical equipment, automobiles, motorcycles, bicycles, furniture, toys, electronic equipment, household appliances, etc.