40 piece set includes Impact bits 25mm x 24, Impact bits 50mm x 8, Impact socket adapter 50mm x 1, Impact magnetic bit holder 60mm x 1, Impact 50mm nut drivers x 3 (8mm, 10mm, 13mm), hss drills with hex shank x 3 3.5mm, 4mm, 5mm. Suitable for use with impact drivers X8 impact material bits with a black phosphate finish Impact magnetic bit holder & socket adapter - X3 HSS drill bits Features a hexagonal shank design for compatibility with various tools and easy bit changes