You may need to lubricate them before sliding them on.

Brand: Snap-On
Type: Snap-on Vintage KR-402A Tool Box Handle Roll Cab Handle Red
Warranty: No Warranty
Color: Red
Manufacturer Part Number: KR-402A
Features: 2 New After Market Rubber End Caps, 2 Spacers, 4 Mounting Bolts, Original Handle
Height: 1-5/8'' High
Material: Steel
Width: 16-3/4'' Wide
Depth: 1/2'' Deep