It has been designed to work with 3/16" masonry anchors.
The Tapcon 3096910 Carbide Bit is an efficient solution for anchoring applications on concrete, masonry or block surfaces Carbide Bit,5/32" x 4-1/2" L It can be used with the Tapcon 3/16 in tapcon drill bits, which are sold separately. The 5/32" x 4-1/2" L bit is used to drill holes in concrete, masonry and block. shank size and features a carbide tip for enhanced durability.