Heavy Duty Brass retractable pool cover anchors are 3/4" diameter x 1-5/8" long. These are the high quality type that screw into the deck (5 turns) to retract. They are available in lots of 10 for 3.65 each (that's 10 x $3.65 = 36.50) + shipping which is calculated based on your zip code.
Please call for pricing on orders involving more than one lot.