The quick-release drill system for drilling, countersinking and screwing designed for use with Power Drills and Screwdrivers and is compatible with direct-drive 1/4in Hex Shank Power Bits. Drill Size. 2.0mm. (5/64in) Countersink Size. No.4. https://elecena.pl/product/27169503/trend-snap-cs-4-countersink-with-5-64in-drill 2024-11-07 https://elecena.pl/product/27169503/trend-snap-cs-4-countersink-with-5-64in-drill 2025-03-18