Also, an oversized radius leaves a reduced horizontal shelf in the groove which is, or should be, the only contact point with the tang of the lock. Contact by the lock in the root of the groove is a disaster waiting to happen. Perfectly formed ''conventional'' grooves with proper locks and retainers will deliver good service. However, there are sub-standard components on the market that can conspire to destroy a correctly machined groove. The essence of the Bead Loc groove is its simplicity and forgiveness. The groove itself is a straightforward .110'' full radius. The contact points with a Bead Loc radius lock are approximately 2 and 10 o'clock, not at the root of the groove. This system affords minimal vertical movement, especially when valve float is present, which means reduced erosion of the valve for enhanced service life. Manley Performance supports both the ''conventional'' groove system and the Bead Loc system with the most extensive line-up of the highest quality locks in the industry.

Features:

• High quality steel alloy
• Heat treated and black oxide finished
• Available with Bead Loc, single radius, and ''conventional'' square groove designs