LARGE HYPER-STEP HIGH-SPEED DRILL BIT SET, 4 PIECE DB4HSL | Matco Tools
UNIBIT STEP DRILL BIT MU1A | Matco Tools
Matco Tools - Have you met the 2 new members of the Hyper-Step family? The already awesome, Matco EXCLUSIVE Hyper-Step drill bits are proud to be joined by the NEW DB4HSL Large
USA MADE Matco Tools Unibit Titanium Step Drill 1/8” - 1/2” 13 Hole Sizes MU1TA | eBay
MATCO TOOLS 17/32" HYPER-STEP DRILL BIT DBHS34 | eBay
HYPER-STEP HIGH-SPEED EXTRA LARGE DRILL BIT SET, 4 PIECE DB4HSXL | Matco Tools
Finally bit the bullet and picked these up from my Matco dealer. They're called hyper-step and from 17/64” through 1/2” they've got a lifetime warranty, so basically for 350 bucks you get drill bits for life. : r/Tools