Simpson 3/4 x 10-1/2 Retrofit Bolt Zinc Plated RFB#6X10.5 PACK:25 Pk 064 is a 1/4" diameter

064 is a 1/4" diameter 2 Flute Dowel Drill (Short Series (57

They are not designed for use with any other screw type or brand

4x sawn lumber

ARBOR SIZE : 7/8 IN

Drill bit diameter: 1-3/8 in

Simpson 3/4 x 10-1/2 Retrofit Bolt Zinc Plated RFB#6X10.5 PACK:25 Pk 064 is a 1/4" diameterSimpson RFB#6X10. 5 RFB 3 4 in. x 10 1 2 in. Zinc Plated Retrofit Bolt, Grade 36 is a pre cut threaded rod from Simpson Strong Tie, designed to work with anchoring adhesives to anchor into existing concrete and masonry. Each end of the threaded rod is stamped with the rod length in inches and color coded to indicate the grade or type of steel, enabling quick and easy identification after installation. For 1 2 in. diameters and larger, the distinctive