uxcell 4pcs 25mm 1/4" Hex Shank U4 U Shape Head Screwdriver Bits S2 High Alloy Steel Shank Size: 1/4inch; Bit Dia: 4mm/0.16inch; Total Length: 25mm / 0.98inch; Package Content: 4 x U Shape Screwdriver Bit Easy to install on the screwdriver handle of the bit shank. These Screwdriver Bits are with magnetic design. Great replacement for missing, bent or broken U shape screwdriver bits.