Simpson 7/8 in. x 21 in. SDS-Max Quad-Head Carbide Drill Bit MDMX08721Q Heli-Tie Helical Stitching Tie Light-duty holdown designed for use

Light-duty holdown designed for use in shearwalls and braced-wall panels

Teeth height mm 8

Drilling brick and block masonry

Rods (Diameter 1/2" minimum 2" maximum) - Steel Studs

controlled material removal without splintering or chipping the surface finish

Simpson 7/8 in. x 21 in. SDS-Max Quad-Head Carbide Drill Bit MDMX08721Q Heli-Tie Helical Stitching Tie Light-duty holdown designed for useKey Features Uniformly Brazed Carbide Inserts: Uniformly brazed carbide inserts resulting in longer bit life. Self Centering Tips: Self centering tips for accurate hole placement. Chromium Nickel Molybdenum Steel Alloy Body: Chromium nickel molybdenum steel alloy body ensures hammering quality and extended service life. Heat Treatment & Shot Peened Finish: Heat treatment procedures and shot peened finish increase surface hardness, drilling speed,