Editorial Review KOUL Tools Surseat Lapping Tools are the latest addition to their lineup of unique and innovative tools. The Surseat P-51 Line Lapper is designed for cleaning up flared tubing ends before assembly to prevent leakage. Just like lapping your engine valves to prevent leaks, why wouldn't you lap the surface that's keeping your critical vehicle fluids from leaking. Before you assemble your fluid transfer lines, its important to make sure the flare on the tube has a nice finish. The Surseat lapping tool is designed to provide you with that "lapped" finish.Simple in design and effective in function, the Surseat Line Lapper utilizes a diamond dust lapping head to gently lap in a flared tubing end to create a better seal. The Surseat will smooth out those irritating irregularities after flaring the tube that cause you to spend even more time on your project than you anticipated.The KOUL Tool P-51 Lapping Kit includes both 37° and 45° lapping heads for use on both stainless steel and regular steel brake lines. This kit includes collets sized for line ranging from 3/16" OD to 1/2" OD, and just like all of the KOUL Tools, a custom carrying case for secure storage and transportation!