Three-position practice pen-style cutter one standardized Slice instrumentality blade. proprietary handle with rubberised slider button the amount of exposed ceramic-blade to farther reduce injuries. Three including fully-retracted. proprietary advanced double-sided instrumentality blade SKU # 10404 designed to reduce injuries by incorporating a safer rounded-tip. Sharpness up to 10x longer than steel. 135 mm L x 18 mm diameter -LRB- 5.3 in L x 0.75 in diameter -RRB-. SKU # 10513 .