PURPOSE: Quick screw gutter hangers are designed to add tension to old and new gutters. Pre assembled with large #12 screws with type 17 pointed threads. Fits all aluminum (not plastic) gutters. REPAIRS: Fixes low spots and repairs long, sagging gutters. Solves problems with water backing up and spilling over the side of the gutter. Reinforces existing gutters to withstand heavy snowfall. HIGH STABILITY: Screw retaining pits are available to help achieve positive thread engagement, reduce slippage, secure screw seating, no over torquing, and no stripping of screw heads. Hidden under the antelabium. EASY INSTALLATION: Use a 1/4 inch nut driver and cordless drill to install the gutter bracket. Split less clips means no obstructions and faster installation to the end of the rafter. Total penetration depth is 1 3/8 inches. Great for straight or angled eaves board. WITH 6 INCH DRILL BIT: Quick screw gutter hangers come with 6 inch drill bits to provide more space and simplify installation. Recommended hanger spacing is 24 inches on center., Manufacturer: LICAEVEY