The 37 piece Ratchet screwdriver and socket set comes with an assortment of commonly used sizes. Complete in a handy storage case, this is great for DIY, cars and motorcycles. Can quickly change from one bit to another. Set includes 1 x ratchet bit driver, 1 x magnetic bit holder, 1 x 25mm socket adapter, 20 x 25mm screwdriver bits, CR-V 13 x 1/4"dr. sockets: 4 / 4.5 / 5 / 5.5 / 6 / 6.5 / 7 / 8 / 9 / 10 / 11 / 12 / 13mm and 1 x storage box.