Category 1 is the highest attainable anchor category for reliability

#33 Heavy Duty Jobber Drill Bit

00 x 50 Flat Socket Cap Screw DIN 7991 18-8 (A2) Stainless Steel

5/8 Hex Key Short Arm Alloy

The sharp point and aggressive thread angle penetrate the densest woods without pre-drilling

1 1/8-7 x 10 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (8) Stubby Drill Bits - Fractional Category 1 is the highest1 1 8 7 x 10 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (8) . L9 High Tensile Strength Hex Cap Screws are designed for use in high stress, severe service environments. The highest mechanical strength off the shelf fastening system available, its special features control torque tension characteristics to develop high clamp loads when using properly controlled tightening methods. Brighton Best manufactures L9 bolting from AISI alloy steels. L9