These 16" Wire Batt Supports offer a fast, reliable, and economical way to secure batt and roll insulation between floor joists. Known across the industry as tiger teeth, wire stays, or lightning rods, these high-tensile wire supports are engineered to dig firmly into wood framing, locking insulation in place without the need for adhesives or mechanical fasteners.

Perfect for crawlspaces, basements, and underfloor insulation installs, these wire rods are designed to be 1/2" shorter than the joist spacing. This ensures a snug, tension-fit that holds insulation securely even in overhead or tight working conditions.

Contractors rely on these supports to prevent sagging insulation and maintain long-term thermal performance. Made from durable spring steel wire, they resist bending or losing tension, making them ideal for residential and commercial batt insulation installations.

Each box contains 500 supports, providing excellent coverage for large projects and crew use.

FEATURES & BENEFITS

• 16" length fits standard 16" OC framing

• High-tensile spring steel construction

• Bites into wood joists for secure holding power

• Holds fiberglass batts and roll insulation firmly in place

• Quick installation with no tools required

• Prevents insulation sag and air gaps

• Perfect for crawlspaces, basements, and underfloor areas

• Also known as tiger teeth, lightning rods, or wire stays

• Box of 500 for high-volume contractor use