Caster Classics Big Feet Universal Professional Nail-on Padded Furniture Tack Glides - 16 Piece Pack MUST Pre-drill Pilot Hole to Install (See Product Description) Full 3/4 inch x 1/16 wide Tack Prong Compared to Under 1/2 inch on Most. Industrial Quality Fully Secured Felt Pad Heavy Duty Thicker Plastic Base PRE-DRILL pilot hole to Install - See Full Product Description