Depth Collars and Sets - Southeast Tool SESC-38; 3/8 Inside diameter, 9/16" Outside diameter, 1/4" Length, 1/4 -20 Set screw. Designed for use with drills and counterbores. Features collars with set screws which lock into the drill flute or bit surface. Surface finish either zinc-plated, or black oxide to prevent rusting.
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