Description of π§ Enhance Precision and Efficiency with General Tools 34ST Pilot Bit
4-Piece set. For screw sizes 5-14. 1/4-Inch shank. Drill precise countersink and counterbore screw holes in a single operation when doing fine carpentry and woodworking.
exactly what I wanted/needed. It drills the required countersunk holes of different diameters and the center drill is held by a set screw so it can be adjusted for longer screws.
Pros
Drills precision countersinks and countersinks in one pass for fine carpentry and woodworking applications.
I bought these pilot drill bits for a project that required drilling a large number of pilot holes in soft maple material. Imagine my surprise when the pilot bit broke after I drilled nine holes in a pine fixture I needed for a project. These nine wells were drilled consecutively within 45 minutes. I thought that although the drill worked adequately, the sinker seemed tedious and difficult to operate. The most annoying thing about this purchase is that now you have to start a new search for aβ¦
Used a 3/32" pilot bit and it broke on the 3rd hole. Luckily I had two spare 3/32" titanium coated drill bits to finish the job but one of them broke on the 7th hole. The challenge was to drill 1" to 1/2" cherry and 1/2" soft maple. Two drill bits should never break just to drill 8 holes! The problem I see is that the Drill does not fit snugly in countersink and slightly off-center This causes the drill to oscillate as it rotates so it does not drill a clean hole and when the countersinkβ¦