Draper Magnetic Bit Holder Set (43 Piece)25mm 1/4" bits manufactured from chrome vanadium steel, hardened and tempered with a sand blasted finish. Bit holder manufactured from zinc alloy steel with chrome plated finish. Supplied in a heavy-duty plastic storage case with plastic inlay to hold the bits securely.PRODUCT DIMENSION:Height (mm) :267Width (mm) :132Depth (mm) :41