HHIP 3402-0112 Multi-Use V-Blocks & Clamps Set - 2.5" x 2.75" x 2" - Precision Machining, Metalworking, and Woodworking Tool for Workshop & DIY Projects

it was what I expected and happy with my purchaseThey are indeed within 0.0003". I had a tool maker bring the flatness and parallelism tighter as well as clean up the inside edges. These blocks will be used for Quality Control, so I doubt the clamps will break from hand tightening.One clamp threaded hole was not perpendicular such that anything less than 0.5" round was unable to clamp down.The other clamp was too narrow by 7 mils and unable to fit onto the block.Both clamps were painted and had three threaded holes each.A replacement set was received a week later. Both clamps fit and performed correctly.Note, the replacement clamps had the one threaded hole as in the picture.Both sets of blocks were machined well and with close tolerances (for the price).Wooden box is quite strong and nicely finished. The replacement box had a small amount of damage.Quality is really good on this blocks, The clamps are strong and also in good quality.The price is reasonable and the parts are packed professional in oil paper and in a nice wooden box.I am very pleased.great vee blocks for the money. very accurateClamps fit really tight on the block but they can't be over tightenend since they drilled and tapped holes for clamping parts from the sides. Could end up being a problem and break!There is 0 accuracy. They snapped my first time I used. Will be seeking a full refundThe milling of the slots for the clamps is appalling. The box was destroyed in shipping. One of the clamps is too wide for the slot. I suggest choosing a different brand.The v-blocks themselve are ok and within tolerance. But both of those garbage clamps made of cheap die cast metal shattered in three pieces while clamping delicate parts with moderated pressure. Now i can't use them because i don't have any clamps!