The concrete leg features pre-punched holes that accommodate three distinct anchoring configurations:
Annular-ring shank - mechanically locks into wood fibers to dramatically increase withdrawal resistance and holding power compared to smooth-shank alternatives
more structurally efficient connection
with a replacement bit available (model BIT2S-2-R2) when needed
Type 304 stainless steel for applications requiring high corrosion resistance
Freud Precision Shear Forstner Bit 13/16 in. - Serrated Edge PB-0055 Self-Drilling Hex-Washer Head Screw The concrete leg features pre-punchedThe Freud 13 16" Precision Shear Forstner Bit is a professional grade boring tool engineered for woodworkers who demand clean, flat bottom holes with minimal tearout. Designed for use in a drill press or handheld drill, this 13 16" diameter bit cuts through hardwoods, softwoods, veneered plywood, solid surface, and composites with exceptional precision. Whether you are drilling pocket holes, overlapping holes, or clean through bores, the Freud