100% brand new and high quality Made of high-quality materials, strong and practical Specially designed steel counterbore or counterbore guide hole. The depth of the counter bushing can be adjusted using an Allen wrench. The standard hexagon handle can be replaced quickly. Drills and countersunk heads are used for wood screws, no need to replace the drill bit. Just loosen and tighten the fixing screws, you can adjust the drilling length of screws of various lengths.
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