Wera Tools - Bit-Check 10 Drywall 1Bit Check for drywall construction. High quality spacer out of aluminium; the screwdriving depth can be infinitely adjusted and allows the flush mounting of screws; 9 drywall bits with modified output shaft, 25 mm in length. Features Upright positionable, multi component Bit Check High quality aluminium spacer with infinite adjustment Flush mounting of screws Drywall bits with modified output shaft Data Sheet (PDF)