McMaster 2361A64 V-Block, Hardened, for 4-3/8" Maximum Workpiece Diameter

Precision ground to tight tolerances, these V-blocks help you accurately align and support round workpieces.

V-Blocks with Clamp — Choose a block with a clamp to secure your workpiece in place. The clamp is removable and shaped to fit inside the vee, so you can face it up or down to hold a variety of workpieces. Since it's flush with the block faces, you can position the blocks on any of their sides.

Hardened Steel — Hardened steel blocks are more durable and wear resistant than steel blocks, so they'll stay precise even with heavy use.

Style C — Style C have mounting slots near their base, so you can attach them to work surfaces with setup clamps (not included). They have a continuous slot, so you can clamp any of the sides.