Intervertebral implants, instruments, and methods

A spinal implant for fusing vertebral bones, the spinal implant comprising:

• a polymer body fabricated using additive manufacturing;
• a through opening of the polymer body to receive bone growth material;
• an annular wall of the polymer body extending about the through opening;
• an attachment member of the polymer body extending outward of the annular wall;
• opposite lateral sides of the attachment member configured to be clamped between clamping arms of an inserter tool;
• a narrower portion of the attachment member including a first pair of opposite side surface portions having a first width therebetween across the attachment member;
• a wider portion of the attachment member spaced from the annular wall with the narrower portion intermediate the wider portion and the annular wall along the attachment member, the wider portion of the attachment member including a second pair of opposite side surface portions with a second width therebetween across the attachment member that is larger than the first width, the wider portion of the attachment member configured to be in interference with the clamping arms to inhibit separation of the spinal implant from the inserter tool while the clamping arms clamp the attachment member therebetween.