Professional-Grade Load Capacity: 2/4 manganese steel wheel dollies with 3000/6000 lbs total capacity. 30% stronger than carbon steel, ideal for heavy vehicles like trucks, SUVs and trailers. Features industrial durability, suitable for workshops, garages and auto repair shops. Ultimate Control & Safety: Non-slip concave design + double-row round head pins prevent vehicle displacement during movement. 360° swivel casters (2 locking wheels) enable precise positioning, even 180° vehicle rotation on flat surfaces. Easy Heavy-Duty Movement: Integrated handles allow one-handed movement of cars, motorcycles, ATVs or lawnmowers. Quick-brake wheels ensure stability when parked. Perfect for tight spaces in showrooms or restoration projects. Universal Vehicle Compatibility: Fits sedans, pickups, RVs.