BEMONOC Small DC 12V High Torque 8 RPM Turbo Worm Geared Motor Metal Gears Shaft Output 8mm for DIY Parts Rated voltage: DC12V; No-load speed: 8RPM; Rated torque: 48kg.cm; Stall Torque: 126kg.cm; Reduction ratio:1/634; Mounting Screw Size: M4 (not included); Low noise: db&lt;45 (A); DC Motor Body Dimensions: 31 x 57mm/ 1.22" x 2.24"(D*L); Gear Box Dimensions: 58.1 x 40.1 x 35mm/ 2.28"x1.58"x1.37"(L*W*H),Output Shaft Dimensions: 8 x 15mm/ 0.31" x 0.59"(D*L) with 1x 13mm/ 0.039*0.51(H*L) flat cut off; Wire Length : 19mm/7.4"; is_customized: Yes; The motor is miniature DC Worm Gear Motor, you can change the wiring-connection to change shaft rotation direction,with self-locking, the output shaft can't rotation when power-off, that is self-locking. The reducer output shaft arranged vertically with the motor shaft, whole motor output is relatively short,can be widely used in various of occasions that require special installation size. Package: 1PCS x DC Geared Motor; if you need other voltage and rpm, pls contact us, there are many other models of this motor in store.