Backer-On Rock-On No. 9 X 2-1/4 in. L Star and similar items

Backer-On Rock-On No. 9 X 2-1/4 in. L Star Flat Head Cement Board Screws 100 pk Backer-On Rock-On 2-1/4 in. cement board screws are designed for attaching Hardie Backer or equivalent fiber cement backerboard to wood or light gauge steel studs. Backer-On Rock-On patented serrated head design countersinks for flush seating at any angle, providing a smooth surface for tile. The Star drive recess with T-25 bit provides Stikfit for 1-handed installation. Backer-On Rock-On screws feature a Climacoat corrosion resistant finish that prevents rust from bleeding into grout and are perfect for use in high moisture areas such as baths, showers, countertops and floors. Conforms to ANSI A108.11 for cement board attachment. Backer-On Rock-On screws can be installed with a standard impact or drill/driver and T-25 Star drive bit for cement board fastening done right. Patented sharp point offers immediate pick-up and eliminates the need to pre-drill Patented design allows attaching close to edge on cement board, reducing fractures or blow outs Serrated thread forms require less torque for faster installation Specifications: Brand Name: Backer-On Sub Brand: Rock-On Callout Size: No. 9 Length: 2-1/4 in. Drive Style: Star Head Type: Flat Head Product Type: Cement Board Screws Number in Package: 100 pk Driver Bit Included: Yes Color: Green Indoor or Outdoor: Indoor Self Drilling: Yes Finish: Zinc-Plated Packaging Type: Clamshell Thread Type: Serrated Application: Multi-Purpose Material: Steel Self Tapping: Yes WHAT'S INCLUDED: T-25 Star Drive Bit Details Product Dimensions: 8.0 x 6.0 x 4.0 inches Item Weight: 1.13 pounds Shipping Weight: 1.13 pounds Item color: Multicolor Item model number: 23520