These Faithfull Screwsinks can be used for drilling, countersinking and counter-boring in one operation. The countersinking part can be slid up and down the drill part of the tool by means of a hexagon key to suit the depth of hole being drilled.

Can be used with all venetian blinds and slat sizes. Allows quick and effective dusting to keep blinds clean. Dry Use Only 7 Microfibre Brushes Plastic Handle