The ControlTecc is the firmest Arch shell with the most rear (heel support) and mid foot control (arch support) in the Healix Care range

5/32" spacing between holes

Los Altos Boots Mens #76F0543 European Square Toe | Genuine Ostrich Leg With Deer Sides Boots | Color Faded Burgundy

Does not compress to provide best elevation

Tandy Leather | Rapid Rivets 100/pk Antique Brass Plate #1273-15 | Measure Medium Tools The ControlTecc is the firmestTandy Leather Rapid Rivets 100 pk Antique Brass Plate #1273 15 Measure Medium Extra Small: Cap 1 4" (6 mm), Post 3 16" (5 mm), Base 1 4" (6 mm) Small: Cap 1 4" (6 mm), Post 1 4" (6 mm), Base 1 4" (6 mm) Medium: Cap 5 16" (8 mm), Post 5 16" (8 mm), Base 5 16" (8 mm) Large: Cap 5 16" (8 mm), Post 1 2" (13 mm), Base 5 16" (8 mm) Use setter #8100 00 and anvil #8056 00 or setter kit #8105 00.