5/16in Magnetic Hex Socket Long 65mm
The Tri-Fixx 5/16 inch magnetic hex socket is a 65mm long driver built for 5/16 inch roofing bolts, hex head screws and sheet metal screws. The lobular design reduces breakage and stops the socket rounding off the screw head, which is a common problem when driving hex head fasteners in an impact driver. A forged tip and a curvy body shape round out a design made for roofing work.
Key Features
- Suitable for 5/16 inch roofing bolts, screws and sheet metal screws
- Lobular design reduces breakage and rounding of the head
- Forged tip for maximum grip on the fastener
- Innovative curvy body shape designed for a comfortable grip
- Made with newly designed CNC machinery for precision
- Increased rotation angle for easier driving in tight spots
Specifications
- Driver type size: 5/16 inch
- Length: 65mm
- Body: innovative curvy shape, CNC machined
- Tip: forged for maximum grip
- Use: 5/16 inch roofing bolts, hex head screws and sheet metal screws
Applications
- Driving 5/16 inch hex head roofing screws
- Fixing metal roofing sheets, flashings and gutters
- Driving sheet metal screws in cladding and ducting
- General hex fastening where a firm grip matters
What You Need To Complete The Job
Keep the matching 1/4 inch and 3/8 inch sockets in the kit so you can match the socket to the screw, and add the Supabit 3 piece nutsetter set for a multi size option. See the General Hand Tools range for more driving accessories.
Frequently Asked Questions
Why does the lobular design matter?
A lobular shape spreads the load around the screw head instead of concentrating it at the corners. That reduces the chance of the socket splitting or the screw head rounding off under the high torque of an impact driver. The result is a more reliable drive on hex head roofing screws.
Will this socket fit my impact driver?
Yes. The socket has a 1/4 inch hex shank that fits standard impact drivers and quick change adapters. The forged tip and magnet hold the screw on the bit, and the design is built to cope with the torque an impact driver puts through the fastener.
What size fasteners does this drive?
The 5/16 inch socket drives hex head fasteners with a 5/16 inch head, which covers 5/16 inch roofing bolts, hex head screws and sheet metal screws. For 1/4 inch and 3/8 inch heads, use the matching sockets in the same range.
How do I stop screws rounding off?
Match the socket size to the screw head, push the driver straight into the screw and let the impact driver seat the fastener before applying side pressure. The lobular design of this socket already reduces head rounding, but a worn socket or a slipped drive will still damage a screw head, so replace the socket when the corners wear.




