It is designed to open roll-top desk locks. Most skeleton keys have a bit on one side of the barrel but roll-tops require a double bit, one on each side of the barrel.

Size Information:

Overall Length: 2 1/2" ,Shaft Length: 1 3/8", Bits: 3/16" Wide x 1/8" Tall

Inner Barrel Diameter: SOLID, Sizes are Approximate

Note: Choosing the right antique furniture key is not easy, Please check the size information carefully.