Draper Magnetic Bit Holder Set (127 Piece)A comprehensive set of 1/4" bits manufactured from chrome vanadium steel, hardened and tempered with a shot blast finish. Bit holder with quick release collet allows bits to be expelled quickly and efficiently. Supplied in a heavy-duty storage case with plastic inlay to hold bits securely.PRODUCT DIMENSION:Height (mm) :365Width (mm) :252Depth (mm) :46