Features Short (2"). Requires 3/4" bit. Takes 1/2" screw. Use in mortar & concrete. Zinc. Box of 8. Box of 8 Specifications Dimension: 2.6" H x 3.3" W x 4.3" L Weight: 1 lbs .
Provides secure anchorage of lag screws in concrete and the mortar joints of block and brick. Short lengths may be used to shorten drilling time. Four way expansion insures a tight grip and prevents over expansion. No lubrication is required.