Product Name: Hole Saw; Use for: Wood, Iron, Aluminium Alloy Cutting Diameter: 125mm / 4.921inch; Diameter: 12mm / 0.472inch Hole Saw Depth: 37mm / 1.457inch; Twist Bit Diameter: 6mm / 0.236inch Total Length: 97.5mm / 3.8inch; Material: Metal; Color: Red & Black Net Weight: 676g Net Weight: 676g; Product Description Note: Be careful to avoid skipping of the blade when using a hole saw, this can ruin the finish of your case Masking off the area remotely close to the intended hole is a good idea bit for a drill designed for making a perfectly round hole in a material Backer, and cap work together to provide faster, longer-lasting cutting action Positive rake teeth clear chips better for longer life and easier cutting Teeth stay and make smoother cuts. Package Contents: 1 x Hole Saw 1 x Twist Drill Bit Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.