Irwin Lock-n-Load Quick Change Extensions 7/16" X 12" Electrical Boxes & Accessories Provides two locking points

Provides two locking points

Carbide-tipped spiral bit with WILD BOAR multi-cutter x-head has 4 chiseling faces and cutting edges for more efficient drilling

3/8-inch wide blade reduces wind drift and tape weight

patented variable tooth technology provides faster cuts with less vibration

#6 Slotted 1" Insert Bit Tip

Irwin Lock-n-Load Quick Change Extensions 7/16" X 12" Electrical Boxes & Accessories Provides two locking pointsLock n Load Quick Change Extensions Features: Carbon steel construction sleeve and body for durability and life Lock n Load system for one handed quick release Patented jaw design holds bits securely on 6 flatted shanks, as well as ball detent bits 1 4" Quick Change range now holds insert bits; magnetic for holding