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Drop in anchor for concrete floors where the depth of the hole must be restricted. This is the case with pre-stressed garage floors which are reinforced with steel bands under tension. The anchor accepts a 1/4"-20 bolt up to 3/4" long.
This anchor requires a 3/8" hole, 1" deep. After dropping the anchor in place, use tool 83-0004 and a hammer to force open the wings of the anchor. Anchor is made of Zinc coated steel.
Note that the 1/4" bolt does not contribute to the retention of the anchor in the concrete; that is controlled solely by the tool. This feature allows different length bolts to be used.