Product attributes Item No.; Drill Key Model: four-in- key (black), four-in- key (silver), 10mm drill chuck key quenching, 13mm drill chuck key quenching, 16mm drill chuck key quenching Material; 45# steel product alias; wrench Series; Electric Drill Key Specifications: [ Sizes]; There are four sizes electric drill lock keys, A: 5.5-17MM, B: 6-19MM, C: 9-27MM, D: 7.7-19.3MM, chuck key can open more than Kind of drill lock. 【Upgrade and Thicken】 electric drill key is made of high hardness torsion , which can withstand greater resistance, stronger force, durable, ideal electric drill accessories. 【High-precision system】Zinc alloy drill teeth, exquisite and compact, flexible in rotation, easy and labor-saving, are the perfect key electric drill chucks. [Special process] The surface of the electric drill chuck is plated with black, which is deeply rust-proof, the surface is smooth and polished, and it is dense and wear-resistant. 【Punching Design】The chuck key is universal, the center hole can be threaded, it is easy to carry and use, and it is suitable most chucks. Package Included: 1*Electric Drill Key