They have a large magnet running down the stem of this holder. That way it will stick to the metal surface and the bushings will be in place. Thus the ends of the sockets are kept closed. Pretty good magnet holding the largest of the sockets. So I think it's a good buy.
TANCHEN 6PCS Socket Organizer Trays - Black SAE & Red Metric, 1/4, 3/8, & 1/2-Inch Drive Socket Holders
23 Review
Universal Ombra OMT94S, 94 pcs, brown
18 Review
Hammer drill BOSCH GBH 2-28 (0.611.267.500), without battery, 880 W
20 Review
OEMTOOLS 24616 29" Portable Tear Down Tray - 55-Pound Capacity Mobile Table For Mechanics
29 Review
Xiaomi Mijia Ratchet Screwdriver 16 in 1 Screwdriver with Interchangeable Bits, 10 pcs, Black
22 Review
Bit and socket set Stels Tool set, 1/2", 1/4", CrV, plastic case 94 pcs, Stels, 94 pcs, black
46 Review
Rechargeable screwdriver OA-3,6F (433.0.2.00), 3.6 V, 1.3 Ah Li-ion, blister
46 Review
Xiaomi Mi x Mijia Wiha Precision Screwdriver Set (DZN4000CN), 25 pcs
34 Review