手金 is read as てきん (tekin) and means deposit.
てきん
tekin
てさげきんこ
portable safe
てあし
hands and feet
てぬぐい
(hand) towel
て
ability to cope
てまえ
tea-ceremony procedures
てづくり
handmade
てま
time
てほん
model handwriting
てがみ
letter
てもと
grip
ていれ
(police) raid
てわけ
division of labour