Flat Bottom Counterbore And Countersink Drill Bit One Eighth Inch With Three Eighth Inch Counterbore For Lag Screws Bolts Washer Head Screws T Nuts Power Bit With Drive Shank One Quarter Inch Hex Usa Made For Precise Clean Holes In Wood And Metal
This compact drill bit combines a pilot hole drill with a flat-bottom counterbore, letting you prepare wood or soft metal for strong fasteners such as lag screws, washer head screws, and T-nuts.
✅ 1/8 in pilot hole diameter
✅ 3/8 in flat-bottom counterbore for flush seating
✅ 1/4 in hex drive shank for quick bit changes
✅ USA made for quality and durability
✅ SD-3 counterbore compatibility for common fasteners
💡 What is a flat bottom counterbore drill used for in woodworking and metalwork? This handy bit enables drilling a pilot hole and a flat-bottom counterbore in one pass, speeding up assembly and ensuring a clean, flush seating for screws. - flat bottom counterbore for lag screws and washer head screws - pilot hole plus counterbore in one step for quick assembly - compatible with standard SD-3 counterbores and 1/4 in drive