With the Bahco 3830-21-VIP Sandflex bimetal holesaw, you can cut clean, accurate 21 mm holes through wood, plastic, and various metals including stainless steel. The durable bimetal build with 8% cobalt delivers dependable wear resistance, while the variable 4/6 teeth per inch design reduces vibration and clears chips smoothly. Combined with a maximum cutting depth of 38 mm (1 1/2 inches) and convenient side slots for easy core removal, you stay productive from start to finish.