Groco IBV-S Full Flo Stainless Steel Ball Valves Patent-pending handle has square hole to accept standard ratchet (helps you to reach hard-to-reach valves and eases actuation of hard to operate valves). Handle has thumb-release locking mechanism to ensure that the valve remains in the open or closed position you have selected until you wish to change it. #304 stainless steel handle and trim. #316 stainless steel body. Bonding attachment. TFE seats.