The reserved distance between the drill bit and the top can be adjusted as required. Stroke adjustment knob, adjust the drilling depth, start-stop switch adjustment knob, adjust the pressure of the start-stop switch. Metal pressure plate type start-stop switch, rubber-coated non-slip handle.Bronze starting pin, 1/4 air inlet (pneumatic oil filling hole). The air inlet is equipped with a filter to prevent foreign matter from entering the movement and damage. Features: Model: BD-6024 Product name: Pneumatic spot welding drill No-load speed: 1400rpm Drill size: 6.5mm Chuck size: 8mm Air inlet: 1/4 Net weight: 1.8kg Product size: 33.1x4.1x12cm Packing size: 33.512.55.5CM Gross weight: 2.1KG Net weight: 1.8KG/ The package includes: 1 X Pneumatic spot welding dri.