Clock Hands › Three Tall Case Clock Hand Retainers, 9mm between blades. Three Tall Case Clock Hand Retainers, 9mm between blades. $9.00 Three Tall Case Clock Hand Retainers, 9mm between blades.. Used to hold the hour hand in place on many grandfather clocks. Three Tall Case Clock Hand Retainers, 9mm between blades.. Used to hold the hour hand in place on many grandfather clocks. Add To Cart Added!