Megapro 9BP-ENPD-3A Replacement Bit Packs, F2D4-6S, P2D1-2S, S2D1-2S Replacement bit set Use with the 151NAS, 151SS, 181ML and 211R2C6RD drivers Store easily in the patented pullout bit cartridge Bits are Nickel plated for durability Can be used with any drill that has a 1/4-Inch quick change chuck Replacement bit pack Use with the 151NAS, 151SS, 181ML and 211R2C6RD drivers Store easily in the patented pullout bit cartridge Bits are Nickel plated for durability Can be used with any drill that has a 1/4-Inch quick change chuck Made in the USA