CREATE TABLE table_16508 ("Hand" TEXT, "1 credit" FLOAT, "2 credits" FLOAT, "3 credits" FLOAT, "4 credits" FLOAT, "5 credits" TEXT)

What is the hand for 4 credits is 1600?
SELECT "Hand" FROM table_16508 WHERE "4 credits" = '1600'
SELECT "Hand" FROM "table_16508" WHERE "4 credits" = '1600'