Southeast Tool SESC-38 Depth Collars 3/8" ID x 3/4" OD x 7/16" Width, High Speed Steel Go to amazon.com Related posts The 11 best shaft collar 3/8 2022 FeatureDepth CollarDesigned for use with drills and counter boresFeatures collars with set screws which lock into the drill flute or bit surface DescriptionDepth Collars & Sets. Designed for use with drills and counter bores. Features collars with set screws which lock into the drill flute or bit surface.