Koul Tools Introduces Innovative Surseat Hard Line Lapping Tool


New from Koul Tools – the Surseat hard line lapping tool for brake and fuel systems. This versatile tool can easily clean up the surface of flared lines and even rejuvenate the seal on old lines. See more details below.

Official Release:

Now there’s an easy way to ensure optimum sealing with flared hard lines employed in crucial brake and fuel system applications. The innovative new Surseat tool removes irregularities in the flare and prevents surface risers. In addition to perfecting newly-flared stainless steel, aluminum or copper lines, the Surseat can also rejuvenate the seal on existing brake and fuel lines for restoration projects.

The Surseat operates on the same premise as the ages-old process of lapping engine valves. A precision diamond dust coated lapping head (in either 37° or 45° configuration) literally polishes the flare smooth to perfection.

It comes with collets for 3/16″ to 1/2″ tubing, and collets to accommodate 3/16″ and 1/4″ threaded brake lines. A custom carrying case is also included. The Surseat P-51 kit is a valuable asset for car builders, automotive repair facilities and serious do-it-yourselfers.


  • Removes irregularities in the flare
  • Prevents surface risers
  • Rejuvenates the seal on existing brake and fuel lines

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About the author

Chris McWilliams

Chris McWilliams grew up watching his dad race go-karts around his Southern Indiana home and started racing junior dragsters when he was 10 years old. Chris drove a UMP Mini Stock for two seasons until he totaled his racecar in an accident at Western Kentucky Speedway. He is currently a college student at Oakland City University working on a degree to pay the bills for his dirt racing addiction.
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