This screwdriver set is manufactured with fine workmanship and precise modeling design for stable performance and durability. 4 gears of torques adjustment, one button switch, 1 gear of 2.5Nm for instrument repairing , 2 gear of 3Nm for model assembly, 3 gear of 3.5Nm for furniture assembly, 4 gear of 5Nm for plumbing and electrical installation. Wide applications, suitable for repairs and maintenance of electronic products and precise instruments such as motorbike, cellphones, watches and home appliances. Two specifications avaible, you can choose 2pcs set and 20pcs set according to your demands. 2pcs set: 1pcs screwdriver, 1pcs Type-C cable, 2pcs bits. 20pcs set: 1pcs screwdriver, 18pcs different screwdriver bits, 1pcs Type-C cable, 1pcs cardan shaft. Specifications: Name: Screwdriver and Drill Bits Set Type: 2pcs set, 20pcs set (optional) Battery: 1 * 3.6V, 1300mAh battery (included) Rated voltage: DC3.6V No-load speed: Max 200r/min Max torque force: 5Nm Package size: 200 * 160 * 100mm / 7.87 * 6.30 * 3.94in Package weight: 2pcs set: 682g / 1.50lb 20pcs set: 1060g / 2.34lb Packing List (2pcs set): 1 * Screwdriver 1 * Type-C Cable 2 * Bit OR Packing List (20pcs set): 1 * Screwdriver 1 * Type-C Cable 18 * Different Screwdriver Bits 1 * Bit Connection Rod 1 * Cardan Shaft