Smith Adjustable Tongue Keel Roller Brackets for 3" Tongue. SAVE BIG! Genuine, high-quality Smith accessories. These offset Brackets mount on tongue to hold roller for keel support. Offset is 1" ; length is 11 1/2". Mounts with 3/8" diameter bolts. Hardware and roller included. Display packaged. Save big, thanks to a special purchase. Order Today! Smith Adjustable Tongue Keel RollerBrackets for 3" Tongue