【4-Piece Complete Luggage Set】 Includes 16"" (carry-on), 20", 24", and 28" hardside suitcases - perfect for travelers who need multiple sizes. Use all four for family trips or pick the right size for weekend getaways and long-haul journeys. 【TSA Approved Lock & Security】 Every suitcase comes with a built-in combination lock approved by the Transportation Security Administration (TSA). Airport security can unlock, inspect, and relock without breaking your zippers - safe for check-in to all 50 states and internationally. 【Smooth 360° Double Spinner Wheels】 Dual-wheel design rotates 360° with ultra-low rolling resistance. Glide alongside you, no wobbling or dragging - even on carpet or uneven pavement. 【Multi-Stage Adjustable Handle & Ergonomic Grip】 The lightweight, corrosion-resistant telescopic handle adjusts to 2 heights, fitting users of all statures. 【Lightweight & Impact-Resistant ABS Shell】 Crafted from durable ABS plastic, these suitcases withstand heavy baggage handling while remaining lightweight (under airline weight limits easily). The scratch-resistant check-in pattern keeps them looking new longer.