SG Spiral Taps Burrless / SG Spiral Taps Burrless Left Hand Helix
Zero burr with cutting the internal diameter area on internal thread
S-edge (Shaving edge)
No gap between thread root area of tap and pre-hole design acheves Zero burr!
G-chamfer (Guide chamfer)
Chamfered rake face reduce the chipping of cutting edge by chip biting