We looked at several climbing holds from other brands. One was very similar to these but had elongated grooves for mounting bolts. I didn't like it because I feel the screw heads have a rather small contact area. Another brand only had a hole for a bolt and also a much smaller hole for a screw. I didn't like that plan either. I know that some woods have alternating bands of soft and hard texture that can cause the bit to wobble, but I'm pretty confident I can handle it and drill holes exactly in place. Round holes for me, please, and two bolts per handle. They look pretty durable. The backs are a little hollow, but I suspect making them solid would be a lost game during the molding process, as the solid areas of cooling plastic accumulate too much shrinkage and cracking. So I think it's correct. Durability and safety are my main concerns, but I would like to mention that they are beautiful colors.
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