Carsun Provides AFull Set Of Floor Lock Brakes With Easy Installation,they Only Need To Use A Bolt To Connect Or Weld In The Bottom Of The Movina Eauipment,Then Can Fix The Moving Eauipment Freely At AnvTime.You Can Pressed On The Pedal By Feet,Then Heighten And Fix The Moving Equipment.The Built-in SpringMakes Rubber Pad Be Close To The Floor,It Not Only Makes Your Equipment Be Steady But Also Protects TheWheels From Damaging Because OfLong- Time Stress. If You Want To Move The Equipment Once Again,You Only Need To Step On The Release Ba,The Full FloorLock Brake Can Be Returned To Oriainal State,it Needn't Be Risen Up And Be Out Of The Floor By Manpower,Then The Eauipment Can Be Moved Freely. Carsun Offers Nine Kinds Of Different Specifications Of Floor Lock Brakes,They Can Be Applied To TheCasters OfRegular Size And Load Height. American style floor lock brakes Product features Top plate: made of high-quality steel plate, which can be changed to two sizes, 62 * 92mm or 100 * 114mm. Floor Holes: Four slotted holes for easy installation. Spring(inside tube): the spring with durable, high elasticity and high quality can carry heavy objects. Restoring rod: gently press a restoring rod to immediately retract the support frame to its original state, which is labor-saving and easy to operate. Welded steel structure: durable steel structure provides safe, reliable and trouble free use effect. Foot pedal: easily start the foot pedal with high sound and fix objects. Brake pad: anti slip rubber pad makes the support frame safe and stable on smooth or uneven roads. This design is only used on horizontal floors. Surface treatment: rust proof and bright galvanized treatment makes it beautiful and durable. For 2 Series Casters MODEL NO FL2030 FL2040 FL2050 Size 3 4" 5” Extended Height 121mm 140mm 159mm Retracted Height 94mm 114mm 131mm Top Plate Size 62x92mm Bolt Hole Spacing 71mmx78/45mm Bolt Hole size 8.2mm   For 4&6 Series Casters MODEL NO FL4040 FL4050 FL4060 FL4080 Size 4" 5" 6" 8" Extended Height 149mm 169mm 197mm 247mm Retracted Height 125mm 141mm 169mm 219mm Top Plate Size 100x114mm Bolt Hole Spacing 67x76mm/76x90mm Bolt Hole size 11mm