Material: Steel body & Alloy heads

Adjustable range: 40-300mm

Cutting Hole Diameter: 40-120mm, 40-200mm, 40-300mm

Cutting Depth: 30mm

Shank Diameter:10mm (Suitable for 10mm diameter electric drill)

Suitable for drill: Plywood, Laminates, Composite, Gypsum, Rubber, Plastic, Hardwood etc.

Wide range of uses, hole diameter size can be adjustable. Alloy blades, cutting smooth, the hole wall are smooth and no glitches, good effect of the

straight roundness, opening hole depth is 30mm.

1. Two blades reach drill center distance are equal, can open hole.

2. Two blades reach drill center distance are not equal, can get concentric rings and circles.

3. Before drilling to check whether the blade is fixed and adjustable diameter bolts tightened to prevent accidents

4. When the blade is not sharp please grind the blade then use.