The LD-344 hardened steel concrete and masonry nail assortment provides contractors and distributors with a complete size range of fasteners engineered to penetrate concrete, brick, block, and mortar without bending or mushrooming on impact. Each nail is manufactured from high-carbon steel that is heat-treated to achieve the hardness required for driving into hard masonry substrates, a critical distinction from ordinary mild-steel nails that deform and fail under the same conditions. The flat head design ensures a flush, tidy finish when securing trim, furring strips, and framing members to masonry walls, while the fluted or grooved shank grips the substrate to resist pull-out under vibration and thermal cycling.

The assortment covers five practical sizes to match the most common on-site requirements. SIZE 1 at 20mm (0.75") handles light trim and small cleat work; SIZE 2 at 25mm (1") suits baseboard and light molding; SIZE 3 at 40mm (1.5") covers general furring and batten fixing; SIZE 4 at 50mm (2") tackles door and window frame anchoring; and SIZE 5 at 75mm (3") is built for heavier structural formwork and scaffolding tie-ins. Shank diameters from 2.5mm to 4mm scale with length, giving each size the stiffness needed to drive straight and the body mass to hold firmly once set.

Surface finish options include zinc-plated silver for general indoor and covered outdoor corrosion resistance, black oxide for a discreet appearance behind trim and in dark substrates, and natural steel gray for cost-sensitive bulk applications. The color-coded boxes visible on shelf make size selection fast and intuitive at the job site or retail counter, and the compartmentalized assortment format lets buyers stock a complete size kit in a single, organized package.

For wholesale buyers, the LD-344 supports full OEM customization including tailored nail lengths and shank diameters, finish selection, custom head styles, logo printing on boxes, and bespoke assortment compositions to match regional fastening preferences. With an MOQ of 500 pieces, mixed-order flexibility, and CE / ISO 9001 / RoHS / SGS compliance, it is an ideal stock item for building-material suppliers, hardware distributors, and construction fastener importers seeking a dependable masonry nail program.