Gutter hangers come with pre-inserted 3inch long, 1/4 inch hex self piercing screw, allowing easy installation with 1/4 inch nut driver and cordless drill. For proper support, place gutter brackets at least every three feet (two feet in northern climates where snow and ice may add weight). Constructed with aluminum alloy, these brackets feature reinforcing rods and galvanized screws, designed for reliable support and resistance to breakage. Hidden gutter hangers with superior engineering: screw fixing grooves for reduced slippage, ribbed design for added strength, and splitless snaps for easier, quicker installation. Ideal for repairing sagging gutters, low spots, and reinforcing existing gutters. Fits all 5inch aluminum (non-plastic) gutters and works with straight or angled fascia boards. Color: as shown. Material: Aluminum. Size: 5inch. Package Contents: 10x Gutter hanger with pre-inserted screws. Only the above package content included. Note: Light reflection and different displays may cause slight color variation from the real item. Measurement allowed error is +/- 1-3cm.