Model SPD-SL ROAD Bike Fit Cleat Wedges for Look/Shimano 3-Hole Road Pedals work with Shimano SPD-SL (Shimano Road), Campagnolo, Time Road, and similar 3-hole cleat systems.Features: Solves problems with alignment and common cycling pain (foot, knee, and back). Relieves pressure or hot spots on the outside of the feet. Allows foot to function naturally without being forced flat by the pedal. Durable plastic construction to withstand harsh road conditions, debris, and dirt. Increases foot stability leading to improved power transfer. Flexible enough to conform to the stiff sole of a rounded cycling shoe. Specially designed formula increases the strength of the plastic. Compatibility: Shimano Compatible Cleat wedges work with Shimano SPD-SL road, Campagnolo, Time Road, and similar 3-hole cleat systems.Includes: (8 pcs) 3-hole Cleat Wedges (2 pcs) 12 mm Hex Screws (4 pcs) 14 mm Hex Screws Installation instructionsWhy Wedge? The 3-hole system is also known as the SHIMANO system (named after the pioneering manufacturer). The 3-hole system is most often used for road cycling because it offers a stable platform for energy transfer while riding. The soles of many performance-oriented shoes are designed more for riding than walking, featuring stiff soles and minimal tread. The larger cleat design incorporates a three-fastener connection, which provides a more secure attachment than the 2-hole type. Popular brand names of 3-hole cleats include Shimano SPD-SL, Time Road, and others.Model SPD MTB Features: Solves problems with alignment and common cycling pain (foot, knee, and back). Relieves pressure or hot spots on the outside of the feet. Allows foot to function naturally without being forced flat by the pedal. Durable plastic construction to withstand harsh road conditions, debris, and dirt. Increases foot stability leading to improved power transfer. Flexible enough to conform to the stiff sole of a rounded cycling shoe. Specially designed formula increases the strength of the plastic.Tech Specs: Weight: Less than 1 gram Dimensions: 34mm x 33mm Compatibility: Shimano SPD Time ATAC Speedplay Frog Crank Brothers Other popular 2-hole MTB type pedals NOT COMPATIBLE WITH SPEEDPLAY SYZRWhat's in the Box: (8 pcs) 2-hole SPD / MTB compatible Cleat Wedges (2 pcs) 12 mm hex screws (2 pcs) 14 mm hex screws