HOLEMAKER SPIRAL FLUTE STEP DRILL SET, 3 PIECE, 4-20MM / 5-25MM / 6-30MM

The Titanium Nitride coating significantly increases the tool life by providing the following benefits:.
Increased surface hardness to 85HRC.
Ceramic surface, reducing friction by up to 30%.
Especially resistant to cold welding.
Suitable for cutting a wide range of materials

3 Piece Set Includes:
1 x SD4-20MM 4 – 20mm
1 x SD5-25MM 5 – 25mm
1 x SD6-30MM 6 – 30mm