Hilman Rollers FT Series FT Series Rollers offer the most variety in top styles Swivel or Rigid tops come with choice of smooth diamond or padded contact surface. Locking feature is optional with all swivel tops (1) 15 Ton Swivel-Locking-Diamond Top Roller - 4-7/8 x 6-3/8 x 12-3/4 - 49 lbs.