Stanley Black & Decker plans to add drones to its commercial security business, and is developing drone-based systems in partnership with a startup called Sunflower Labs, CNBC has learned.

Best-known for its power tools, Stanley Black & Decker generated 18% of its revenue last year from security products including electronic locks, perimeter sensors and video cameras commonly installed at hospitals and on college campuses. PriceWaterhouse Coopers forecasts the market for security drones will surpass $10 billion by 2020.

Today, Sunflower Labs makes a flying security system for homes, comprised of solar-powered smart lights and aerial cameras. The lights detect motion, and if the software senses it’s unusual, a drone is dispatched to shine a light and record video of the scene.

Users can share the video with private security or local police, said Alex Pachikov, CEO and cofounder of Sunflower with CTO Chris Eheim. “Old school systems frankly get ignored by police because there have been so many false alarms,” Pachikov said.

Stanley Black & Decker is also investing in Sunflower Labs, alongside Silicon Valley venture fund General Catalyst, also an investor in Stripe, Airbnb, Jet.com and Kayak. The new funding of about $3.5 million brings Sunflower’s total capital raised to $6 million.

An investor with General Catalyst, Niko Bonatsos, said he expects Sunflower to help Stanley Black & Decker achieve its broader goals, while gaining a foothold in a new market through the partnership. Stanley Black & Decker is looking to grow its commercial security revenue from $2.1 billion in 2016 to $3-4 billion by 2022.