IRWIN UNIBIT TITANIUM STEP DRILL BITS® IRWIN UNIBIT HSS STEP DRILL BITS® - Speed point tip provides extra cutting edges for faster initial penetration and no need for centre - Speed point tip provides extra cutting edges for faster punching initial penetration and no need for centre punching - Titanium Nitride coating delivers cutting edge life (except 10231) up to 6X longer - High Speed Steel finish - Multiple steps allows drilling for up to 13 different - Multiple steps allows drilling for up to 13 different sized sized holes holes - Three sided shank prevents drill bit slipping in - Three sided shank prevents drill bit slipping in chuck chuck - Burr-free holes deburred by cutting edge of next larger - Burr-free holes deburred by cutting edge of next step larger step - Single cutting edge for perfectly round holes - Single cutting edge for perfectly round holes Product Code Hole Sizes Diameter Increments Product Code Hole Sizes Diameter Increments 15101ZR 13 1/8”–1/2” 1/32" 10231 13 1/8”–1/2” 1/32" 15102ZR 6 3/16”–1/2” 1/16" 10232 6 3/16”–1/2” 1/16" 15103ZR 9 1/4”–3/4” 1/16" 10233 9 1/4”–3/4” 1/16" 15104 12 3/16”–7/8” 1/16" 10234 12 3/16”–7/8” 1/16" 16101 9 4mm-12mm 1mm 11101ZR 9 4mm–12mm 1mm 16102 5 4mm-12mm 2mm 11102 5 4mm–12mm 2mm 16103 7 6mm-18mm 2mm 11103 7 6mm–18mm 2mm 16104 10 4mm-22mm 2mm 11104 10 4mm–22mm 2mm 16105 13 5mm-35mm 2mm-3mm 11105ZR 13 5mm–35mm 2mm–3mm IRWIN UNIBIT HOLE ENLARGING BITS® IRWIN IMPACT QUICK-CHANGE EXTENSIONS - Patented jaw design is compatible with all 1/4” - Perfect for reaming, deburring or enlarging holes quickly hex shank accessories including insert bits - High Speed Steel finish - Large chuck withstands higher torque - Requires pilot hole demands of impact drills - 1/4” quick-change shank is designed to work with impact drivers, and reduces slipping in standard drill chucks Product Code Hole Sizes Diameter Increments Product Code Head Diameter (mm) Length (mm) 10220 8 9/16" - 1" 1/16" 1869516 18.9 152 10221 10 13/16”–1 3/8” 1/16" 1869517 18.9 305 11580 6 14mm–24mm 2mm 1869518 18.9 457 11581 8 20mm–34mm 2mm 125