The Adjustable Hole saw from Klein Tools quickly and smoothly cuts clean holes in drywall and ceiling tiles. Typical DIY and VDV applications include can lights, speaker holes and sprinkler systems. Blades adjust to cut holes from 2-Inch (51 mm) to 7-Inch (178 mm) in diameter.Warnings Never use on or near live electrical circuits. Always wear approved eye protection. Read and follow safety instructions in power tool owners manual. Features No binding while cutting Fits most 3/8 and 1/2 drill chucks Blades adjust to cut holes from 2 to 7-Inch diameter No additional tools needed to adjust the hole saw Newly redesigned dust shield (two included), for keeping workspace clean and preventing shavings and debris particle from being airborne Quickly and smoothly cuts cleaner holes in drywall and ceiling tiles Hole Saw quickly and smoothly cuts cleaner holes in drywall and ceiling tiles Fits most 3/8" and 1/2" Drill Chucks Newly redesigned dust shield (two included) for longer life Hex key included Fits most 3/8-Inch and 1/2-Inch drill chucks Two included dust shields keep workspace clean and prevent shavings and debris particle from being airborne Hole Diameter: 2 in to 7 in (5.1 to 17.8 cm) Weight: 0.31 lbs (5.0 oz) Height: 4.858 in Width: 4.858 in Depth: 2.699 in Type: Quick Cutter Adjustable Saw Country of Origin: China Instructions53731_Instructions.pdfDownloadsSpec SheetVideo DownloadVideo Download