#9 x 2" Quik Drive WSV Subfloor Collated Screws, Quik Guard Coating, Pkg 2000 Deck Nails The square Phillips combo drive adds The square Phillips combo drive adds versatility and reduces cam out These deformation controlled expansion anchors are easily set by driving the plug toward the bottom of the anchor using either the compatible DIABST50 hand setting tool or DIABST50 SDS power setting tool They are designed for fire retardant wood based materials in dry service applications Strong Tie Quik Drive collated WSVF screws are ideal for securely fastening subfloor quickly and accurately while eliminating squeaking floors associated with nails