Sutton Supabit Robertson R2 Screwdriver Bit

The Sutton Supabit S118 is a 50mm Robertson square recess R2 screwdriver bit from the Supabit Extreme Impact range. The Robertson head has a slight taper, which stops the bit from camming out and holds the screw more securely on the driver. It is a popular drive system where a firm, wobble free fit matters, and it is built for the high torque output of an impact driver.

Key Features

• Square recess Robertson design with a slight taper to prevent cam-out
• Holds the screw more securely on the driver for accurate placement
• Developed specifically for the high torque output of impact drivers
• 50mm length suits general screw driving work
• Supabit Extreme Impact certified for heavy duty use

Specifications

• Model: S118
• Drive type: square recess (Robertson R2)
• Length: 50mm
• Pack: 1 piece
• Range: Supabit Extreme Impact Bits
• Compatibility: impact drivers and power screwdrivers

Applications

• Driving Robertson square drive screws
• Working overhead or one handed where a secure bit fit helps
• Impact driver screw driving in joinery and framing
• Trade and DIY screw driving tasks

What You Need To Complete The Job

Pair this Robertson bit with a P&N Quickbit extension bar for recessed screws, and keep a Phillips PH2 bit on hand for the more common drive. Browse the full General Hand Tools range for more bits and driving accessories.

Frequently Asked Questions

What is a Robertson screwdriver bit?

Robertson is a square recess drive system, also called square drive. The recess in the screw head is square and slightly tapered, so the bit sits in the head with a secure, wobble free fit. That makes it easy to place screws accurately and reduces the chance of the bit slipping out.

Why does the taper help?

The slight taper on the square recess means the bit wedges into the screw head rather than sitting loose. That prevents cam-out, where the bit pushes out of the head under load, and it helps hold the screw on the driver so you can place it one handed or overhead.

Which screws use the R2 size?

R2 is the middle size in the Robertson range and suits the common square drive screws used in joinery, cabinet work and general construction. Check the screw head size before driving; if the fit is loose the bit is too small, and if it will not seat the bit is too large.

What does the slight taper on a Robertson bit do?

The Robertson square recess is slightly tapered, which means the bit wedges into the screw head and holds it securely. That prevents cam-out, where a driver pushes out of the head under load, and it lets you place screws one handed or overhead without the screw falling off the bit.