Tip:Suitable for mounting bits with 1/4" external hexagon drive as per DIN ISO 1173-C 6.3 and Wera connection series 1 Design:With adjustable screw depth limitation; allows the flush countersinking of screws; the felt ring (exchangeable) in the front of the bit mounting prevents brush marks on the patio decking; the retaining ring holds the bit securely in the holder Drive:1/4" hexagon, suitable for power screwdrivers with mounting as per DIN ISO 1173-F 6.3
