Feature:1. Using 45# steel quality, casting precision silicon drill stand and hand plate.2. Thickening high-strength ABS engineering plastic handle, the handle hollow, can hold the spare drill chuck.3. Gear precision casting, powder metallurgy industry, high precision, quenching hardened, wear-resisting.4. Double gear drive mechanism, flexible hand operation, not easily jammed.5. Adopt and ordinary hand electric drill general key drill chuck, clamping precision is high, the eccentric bit is not easy to cause fracture.Specification:Condition:100% Brand NewItem Type: Hand DrillMaterial: SteelType: 1/4in, 3/8in(Optional)Size(including drill chuck): Approx.30x8.2x7cm / 11.8x3.2x2.8in Weight: Approx.729g/25.7ozDrill Clamping Range: 0.6-6mm (1/4 inch), 1.5-10mm (3/8inch)Package List:1 x Hand Drill1 x Drill HeadNote:1. Please add oil oil at the gear and the center shaft of the toothed disc to avoid dry grinding and increase the flexibility and wear life of moving parts.2. After use, please use the drill key to loosen the drill chuck, remove the drill and store it. Failure to do so may cause the drop to break the drill bit or puncture the operator or other object.3. Because there was a manual measuring ,the size may has 1-2cm/inch difference.