Description: WEAR RESISTANT: Screwdriver Bit is made of high quality S2 alloy steel and quenched and heat treated, with high hardness, impact resistance, wear resistance and rust resistance, and can be used for a long time. MAGNETIC: Screwdriver bits with magnetic can be adsorbed firmly screw. less damage to the screw. PH2 DOUBLE HEAD: Double Head Electric Screw Driver, screwdriver magnetic rings is detachable for easy use. HARDNESS: PH2 Screwdriver Bit hardness reaches HRC58-62 degrees. EASY TO USE: Professional Magnetic Screwdriver Bits, easy to operate, convenient and practical. Specification: Material: Chrome Vanadium Alloy Steel Size Chart: 65mm/2.56inch 100mm/3.94inch 110mm/4.33inch 150mm/5.91inch Package Includes: Optional: 4Pcs: 3x Screwdriver Bit (Cross Bit 65/100/150mm) 1x Magnetizer (Random Color) 5Pcs: 4x Screwdriver Bit (Cross Bit 65/100/150mm, Straight Bit 100mm) 1x Magnetizer (Random Color) 6Pcs: 5x Screwdriver Bit (Cross Bit 65/100/110mm, Straight Bit 65/100mm) 1x Magnetizer (Random Color) 11Pcs: 10x Screwdriver Bit 1x Magnetizer (Random Color) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!