Specifications: Type of shank: 6.35mm/ 1/4 inch hex shank Size: Y1 Y2Overall length.: 50mm/ 2 inch Material: S2 steel Description: -2 pcs magnetic head Hex Shank Y Type 4-inch screwdriver bars. -S2 steel, this batch of head using S2 steel, batch head surface for steel material color, from inside to outside are the same. -Exquisite workmanship, each edge can be accurately locked screws, no damage to the screw, and the screwdriver head. -Strong magnetic,can suck the screws easily when used it. -Widely used for manual electric screwdriver, screwdriver, drill, air and other tools, ect. -Professional multi size, hexagonal handle on the edge of 1/4 inch. Package Includes: 2 Size 50mm Y Type Head Screwdriver Bits.