Spin Tools 4000 4-Piece Drill Bit Swaging Tool Set 1/4 3/8 1/2 5/8-Inch
(SPIN Tools S4000 4-Piece Swaging Spin Set, 1/4, 3/8, 1/2, & 5/8in. 0mm for 5/8″ tubing dia. ). Because they perform their job using high-temperature and friction, no clamping tools or holders are necessary.