ELCO UltraCon Concrete Screws: 1/4 x 3-1/4, Flat Head, Blue Stalgard Finish, Box of 100 Extinguisher These hammer drill bits come

These hammer drill bits come with either standard cutter heads or X-CUTTER heads

5/32 x 4-1/2 in   Carton Qty

#2 self-drilling point can drill thicknesses up to

75 hours at 90 Õ F and in only 2 hours at 110 Õ F

Diameter of Anchor ÕÌ_

ELCO UltraCon Concrete Screws: 1/4 x 3-1/4, Flat Head, Blue Stalgard Finish, Box of 100 Extinguisher These hammer drill bits comeThe Elco UltraCon (Tapcon concrete blue screws) masonry fastening system offers optimal performance in concrete, brick or hollow block whether anchoring electrical boxes, clips, wood headers, plywood, furring strips, insulation, etc. Cold formed, carbon steel anchors, precision cut carbide drill bits and high quality installation tools all work together to provide excellent pull out and shear values. UltraCon screws feature nail points and high low