Please note that we supply 1 Star Drive Bit free of charge for every 1000 screws ordered, you can however purchase additional individual bits if required. You can do this by adding them to your basket above.
Please see the Technical Information tab for details on choosing the correct Star Drive
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GRK Selection Guide
T10 Star Drive Bits
Length: 25mm
Colour: Yellow
Fits the following screw head recess:
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R4™ Multi Purpose Screw - 3.0 (#4) gauge
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FIN/Trim™ Head Screw - 4.0 (#8) gauge
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RT Composite™ Trim™ Head Screw - 4.0 (#8) gauge
T15 Star Drive Bits
Length: 25mm
Colour: Red
Fits the following screw head recess:
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R4™ Multi Purpose Screw - 3.5 (#6), 4.0 (#8) gauge
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FIN/Trim™ Head Screw - 4.5 (#9) gauge
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RT Composite™ Trim™ Head Screw - 4.5 (#9) gauge
T25 Star Drive Bits
Length: 25mm
Colour: Green
Fits the following screw head recess:
T30 Star Drive Bits
Length: 25mm
Colour: Black
Fits the following screw head recess:
Silva Timber is the exclusive distributor for GRK Fasteners™, manufacturer of 'The Industry's Toughest Screws'. All of GRK's products are built to last and have unique labour saving features.
Why use GRK Screws?
GRK Screws are packed with unique features, saving you time and money:
- CEE Thread enlarges the screw hole, increases the drawing strength, reduces friction, lowers the driving torque and reduces splitting
- Drive into hardwoods and softwoods easily without pre-drililng
- W-Cut™ Thread Design - patented design acts like a saw blade, cutting through fibrous materials and reducing the amount of torque required to install the screw
- Zip-Tip™ - designed for fast starts in any fibrous materials
GRK Screws won't fail where others do, driving in effortlessly and significantly reducing the installation time
Climatek™ is exclusive to GRK products. Originally designed for the Navy, GRK has adapted this coating for fasteners and rigourously tests it to meet and exceed all standards. GRK's Climatek™ coating is virtually indistinguishable from brass and its colour matches almost all wood finishes.
GRK Fasteners revolutionary Climatek™ coating is available only on GRK products.
GRK's Climatek™ coating consists of a total of six layers of various materials, including three layers of zinc-polymer.
Climatek™ has been tested for salt spray resistance, and more importantly, for Kesternich durability. Kesternich cycles are a more advanced way of testing a coated material. Each Kesternich cycle simulates heat, cold, wind, water, salt as well as a variety of other elements, whereas salt spray merely uses salt water for its tests.
Climatek™ passed 29 Kesternich cycles, making it the most advanced coating of its kind.
PHEINOX™ stainless steel products are hardened and come with a limited lifetime guarantee against staining and rusting.
