Features
- Combines drilling and countersinking in a single operation to save time and ensure perfect hole accuracy
- Patented non-slip hex shank design for secure, slip-free operation in 1/22 drill chucks
- Integrated pilot drill prevents chatter and guarantees concentric countersinks every time
- Ground flutes deliver high cutting accuracy and extended tool life
- Industrial-grade Titanium Nitride (TiN) coating reduces heat buildup and prevents burn-out
- Suitable for use with rotary pistol drills, magnetic drills, and impact tools up to 16.5 mm
- Ideal for a wide range of materials including structural steel, stainless steel (INOX), aluminium, cast iron, and plastics
- 4-piece set includes drill & countersink combinations: 8 / 12.4 mm, 10 / 16.5 mm, 12 / 20.5 mm, 14 / 25 mm
Specifications
| Last Modified | 28/06/2025, 08:25:40 | 
| Length | 21 cm | 
| Width | 24 cm | 
| Data Sheet | https://cdn.shopify.com/s/files/1/0340/0965/files/DrillSink_Data_Sheet_6edc3fa6-1f17-4912-92e8-4fc57d448133.pdf?v=1674127417 | 
| Drill Size Range | 8 mm, 10 mm, 12 mm, 14 mm | 
| Countersink Diameter Range | 12.4 mm, 16.5 mm, 20.5 mm, 25 mm | 
| Material | High-grade tool steel | 
| Coating | Industrial-grade Titanium Nitride (TiN) | 
| Shank Type | Patented non-slip hex shank | 
| Compatibility | 1/2\" drill chucks, rotary pistol drills, magnetic drills, impact tools up to 16.5 mm; VersaDrive Rapid Lock adapter | 
| Recommended RPM | Refer to DrillSink data sheet – e.g., 12.4 mm: 110–385 RPM; 16.5 mm: 80–295 RPM; 20.5 mm: 50–230 RPM; 25 mm: 50–185 RPM | 
| Suitable Materials | Structural steel (<500 MPa & <1000 MPa), stainless steel INOX, aluminium, cast iron, plastics | 
| Number of Pieces | 4 | 
Free UK Delivery
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For more information, please see our delivery terms and conditions.
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                      ![HMT 603070-SET4 VersaDrive DrillSink Bit Set, Contains 8/12.4mm, 10/16.5mm, 12/20.5mm, 14/25mm [8662]](http://shop.weldmet.co.uk/cdn/shop/products/8662_{width}x.png?v=1752816256) 
                        
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                      ![HMT 603070-SET4 VersaDrive DrillSink Bit Set, Contains 8/12.4mm, 10/16.5mm, 12/20.5mm, 14/25mm [8662]](http://shop.weldmet.co.uk/cdn/shop/files/HMT_6a_130x.jpg?v=1752816256) 
                    ![HMT 603070-SET4 VersaDrive DrillSink Bit Set, Contains 8/12.4mm, 10/16.5mm, 12/20.5mm, 14/25mm [8662]](http://shop.weldmet.co.uk/cdn/shop/files/603070-SET4-Foam_39b858a2-f2a2-4b10-8ccf-139e92840b57_130x.jpg?v=1752816256) 
                    ![HMT 603070-SET4 VersaDrive DrillSink Bit Set, Contains 8/12.4mm, 10/16.5mm, 12/20.5mm, 14/25mm [8662]](http://shop.weldmet.co.uk/cdn/shop/products/8662_130x.png?v=1752816256) 
                    ![HMT 603070-SET4 VersaDrive DrillSink Bit Set, Contains 8/12.4mm, 10/16.5mm, 12/20.5mm, 14/25mm [8662]](http://shop.weldmet.co.uk/cdn/shop/products/8662.1_130x.png?v=1752816256) 
                    