Product Name: Hole Saw Material: HSS, Titanium Plated Cutting Diameter: 21mm / 0.83 inch Hole Saw Depth: 14mm / 0.55 inch Shank Diameter: 8mm / 0.3 inch Twist Bit Diameter: 5mm / 0.2 inch Total Length: 75mm / 2.95 inch Package Content: 1 x Hole Saw, 1 x Hex Wrench Weight: 65g; Main Color: Gold Tone, Silver Tone