Anello di riferimento per la profondità di perforazione della punta da trapano da 3-10 mm, punta da trapano per legno resistente con chiave esagonale

[Drilling Depth Control] - Precisely control drilling depth using an adjustable depth split-ring screw stopper; ideal for situations requiring accurate hole depth measurement; designed to securely hold the drill bit and clamp it to its entire diameter without the screw contacting the drill string. [Suitable for Your SAE Drill Bits] - For drilling studs and other applications using standard drill bits, center-positioned drill bits, and even countersunk drill bits; sizes are available for standard drill bits of 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, and 10mm. [Easy to Use] - Simply select the appropriate drill bit and stopper screw, slide the stopper screw onto the drill bit, set the desired depth using a ruler or depth gauge (not included), and then tighten the stopper screw with the drill bit and an Allen wrench; the clamping screw protrudes slightly (be aware of this when using near vertical plates). [Upgraded Design] - Stainless steel double-line drill bit with stopper screw. Suitable for: carbon steel drill bits. Securely locks at any position on the drill bit. The split-type limit ring assembly features a split design, with its opening parallel to the drill bit axis, ensuring it won't move or lift after tightening. 【Packaging Contents】 - For convenience, the package includes 8 flat-slot socket wrenches and 1 Allen wrench.