Feature of product:

1.U-shaped groove design facilitates chip removal and fast drilling speed

2.SDS-plus four groove hammer drill bit, suitable for four groove free-force hammer drill

3.Shock-resistant hard alloy cutter head, hard material, impact resistance, low wear rate

4.Diager is the largest manufacturer in Europe, professional manufacturer of drill bits, imported drill bits from France

Instructions for use:

1. Before drilling a deep hole, you must pre-drill the shorter middle-length bore of the same specification. The drill bit must be withdrawn every 10 seconds to dissipate heat.

2. It is recommended to use 4 kg hammer drill for drilling in cement concrete No. B50