Conduit Fitting & Reaming Screwdriver, Hooded Blade Design Keeps Tip From Slipping Out Of Screws, Especially When Tightening Hard To Reach Conduit Fittings, Thicker Hood Is Designed For Rugged Use, Reams & Smoothes 1/2" (13 mm), 3/4" (19 mm), & 1" (25 mm) Thin Wall Conduit Ends To Protect Wire & Permit Correct Installation Of Fittings, Reams Both The Inside & Outside Of The Conduit At The Same Time, Longer Cushion Grip Handle Provides Comfort & More Torque For Reaming, Replaceable Reaming Blade Is Now Held In Place With A 1/16" Hex Socket Set Screw.