CMT 140.128.61 Diamond Compression Bit 1/2" Dia. 1/2" Shank ABW Adjustable Post Base with Wind Uplift Width 2: 3 5/8 in

Width 2: 3 5/8 in

It keeps the base of the column elevated above the concrete footing

For Treated Lumber: Yes

and why are they preferred over bolts

Load-rated performance when installed in pairs

CMT 140.128.61 Diamond Compression Bit 1/2" Dia. 1/2" Shank ABW Adjustable Post Base with Wind Uplift Width 2: 3 5/8 inThe CMT 140. 128. 61 is a Diamond Compression Router Bit for CNC. Diamond compression router bits for CNC machines. The compression spiral geometry cuts both faces cleanly for finish quality cuts on both sides of composite panels. SPECIFICATIONS Diameter (D) 1 2" Cutting Height (I) 1 3 8" Total Length (L) 3 11 32" Shank (S) 1 2" Number of Teeth 1 + 1 Product Type Diamond Compression Router Bit for CNC Shank 1 2" Blade Material Solid Carbide Rotation