The Klein Tools Adjustable Hole Saw with Auto Set Arms offers quick and precise hole cutting from 2 to 7 in or 5.1 to 17.8 cm in drywall and ceiling tile. It features an integrated gearing mechanism for fast, simultaneous size adjustment and to ensure your pilot bit is always centered for clean cuts. The spring loaded collar ensures controlled cuts, while the durable polypropylene dust bowl with integrated vacuum port allows for effective debris containment and effortless cleanup