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Kick Bar Floor Locks

For casters: 4, 5, 6, 8 inTop plate 4 x 4-1/2 inBolt pattern 2-5/8 x 3-5/8 slotted to 3 x 3 in
Kick bar floor locks (FLPLS4, 5, 6 and 8) that bolt to a cart frame beside the casters. Step on the pedal and a spring loaded foot with a rubber pad presses against the floor so the cart stays put while it is loaded; kick the bar to release it. Choose the lock that matches your caster size.

Kick Bar Floor Locks: buying guide

Kick bar floor locks for 4, 5, 6 and 8 in casters, on a 4 x 4-1/2 in top plate with a rubber foot. Step on the pedal to hold a cart or platform truck in place on a level floor.

Floor Lock Size Chart

Match the floor lock to your caster wheel diameter. All models use a 4 x 4-1/2 in top plate. Heights are retracted and extended. Use on level floors only: a floor lock is not a jack and does not replace a parking brake on a slope.

Part # For caster size Retracted height Extended height Top plate Bolt hole pattern
FLPLS4 4" 4-5/8" 5-7/8" 4" × 4-1/2" 2-5/8" x 3-5/8" slotted to 3" x 3"
FLPLS5 5" 5-1/2" 6-3/4" 4" × 4-1/2" 2-5/8" x 3-5/8" slotted to 3" x 3"
FLPLS6 6" 6-1/2" 7-3/4" 4" × 4-1/2" 2-5/8" x 3-5/8" slotted to 3" x 3"
FLPLS8 8" 8-1/2" 9-3/4" 4" × 4-1/2" 2-5/8" x 3-5/8" slotted to 3" x 3"

Size chart

Part Caster size Retracted height Extended height
FLPLS4 4 in 4-5/8 in 5-7/8 in
FLPLS5 5 in 5-1/2 in 6-3/4 in
FLPLS6 6 in 6-1/2 in 7-3/4 in
FLPLS8 8 in 8-1/2 in 9-3/4 in

From product spec fields [S1]. All use a 4 x 4-1/2 in top plate.

How a floor lock differs from a caster brake

A caster brake stops one wheel from turning. A floor lock leaves the wheels alone and presses a rubber foot onto the floor, which also stops the cart from rocking or sliding sideways during loading. It is not a jack: it does not lift or carry the cart's weight.

Use it safely

  • Engage it only on flat, level floors. The product listings warn that use on a slope can bend or break the lock.
  • Use it while the cart is loaded or unloaded, then release it before moving.
  • Mount it at the same height as the casters, which is why each size matches one caster diameter.

Floor lock questions

Which floor lock fits my cart?

Pick the one that matches your caster diameter: FLPLS4 for 4 in, FLPLS5 for 5 in, FLPLS6 for 6 in and FLPLS8 for 8 in casters.

Can a floor lock be used on a ramp?

No. Use it only on flat, level floors.

Does the floor lock lift the cart?

No. It presses a rubber pad on the floor to hold the cart; it does not carry the weight.

Sources

  • [S1] CasterHQ product fields (rated load, diameter, width, wheel and core material, temperature range, mount) and product descriptions for the items on this page, pulled October 20, 2026.

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