deadblow hammers capable of minimizing or eliminating recoils when the hammers impact their targets are discussed which have easy access anti - recoil chambers and which have open sockets for receiving handles that extend the length of the hammerhead body . these hammers incorporate filler materials , which function to negate the effects of the hammer recoils , with improved filling port for filling the filler materials . golf clubs with anti - recoil chamber and insert elements are also discussed .