Heading Caring for you. Purpose Crutch Tips Manufacturer Apex Med Directions 1. Remove tip from crutch. 2. Hold crutch shaft to circle on package to determine proper fit. Uses Fits all standard crutches (1 set). Metal reinforced base. Extra tread for long wear and skid-resistant traction. Fits 3/4 inch (1.9 cm) or 7/8 inch (2.2 cm) diameter crutch shafts.