Wera Patio Construction Set T 1 17 Piece 05134021001Compact Wera tool set with the 17 most common screwdriving tools for patio construction. Bits in stainless steel design prevent extraneous rust. With extra smart bit holder, which enables a uniform depth thanks to the variable screw depth limitation, and prevents damage to decking with the fitted felt ring. High quality 17 peice tool set for evenly flush countersunk screwheads for decking in patio construction Bit holder with adjustable screw depth