Simpson Quik Drive QDPRO250G2 Subfloor Workhorse AttachmentQuik Drive QDPRO250G2 Subfloor Workhorse Attachment This attachment is ideal for fastening subfloor to wood or steel. Non skid teeth increase stability and provide uniform toenailing and countersink on slick surfaces. Available alone or as part of the PRO250G2 subfloor system Expanded depth settings for high density flooring materials Reversible replaceable non skid teeth attachment Uniform toenailing and countersink on slick surfaces MODEL NO. OPTION