set of 56 screwdriver bits made of chrome-vanadium steel 6150. Each bit comes in two lengths: 30 and 75 mm. The set includes two bit holders: fitting a 3/8" and 1/2" shank. SEALEY is a well-known English manufacturer of an extremely wide range of tools designed for automotive work. Many years of research and development of the offer now allow delivering customers the highest quality tools made with the utmost precision regarding the dimensions of each product piece and resistance to deformation and cracking.