Base metals including select copper, brass, tin and nickel dropped at the non-ferrous metal market here today on stockists' selling amidst lower demand from industrial users. While copper cable scrap and zinc rebounded owing to renewed demand from consuming industries. Tin prices fell by Rs 10 per kg to Rs 1,440 from Thursday's close at Rs 1,450. Nickel and copper billets moved down by Rs 5 per kg each to Rs 890 and Rs 473 as against yesterday's close at Rs 895 and Rs 478, respectively.