The tapered wings of Phillips drivers act as a clutch that forces drivers out of screw sockets after the screws are driven home. But the tradeoff is that workers have to lean hard on the drivers to prevent unwanted slippage. Improved ACR Phillips II drivers and screws hit the market in 1993. The ribs mate drivers securely to screws to minimize cam-out while reducing worker fatigue. Using ACR screws and drivers in tandem virtually eliminates cam-out.
Combo screws are a smart compromise.
If necessary, screws can be removed later with a household Phillips screwdriver. Commercial furniture manufacturers and their customers love them. Used by permission. Read our Privacy Policy .